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121221020200200 = 233521693523722787
BaseRepresentation
bin11011100011111111110111…
…110110010010110100001000
3120220012121122022200221202020
4123203333313312102310020
5111342041122132401300
61105452100133204440
734350633612506544
oct3343776766226410
9526177568627666
10121221020200200
113569660074a888
1211719542490720
13528412987ca5b
1421d11b3168a24
15e0338492d8a0
hex6e3ff7d92d08

121221020200200 has 192 divisors, whose sum is σ = 376095428976960. Its totient is φ = 32298925317120.

The previous prime is 121221020200177. The next prime is 121221020200211. The reversal of 121221020200200 is 2002020122121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121221020200200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5319733207 + ... + 5319755993.

It is an arithmetic number, because the mean of its divisors is an integer number (1958830359255).

Almost surely, 2121221020200200 is an apocalyptic number.

121221020200200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121221020200200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188047714488480).

121221020200200 is an abundant number, since it is smaller than the sum of its proper divisors (254874408776760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221020200200 is a wasteful number, since it uses less digits than its factorization.

121221020200200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29736 (or 29727 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 121221020200200 its reverse (2002020122121), we get a palindrome (123223040322321).

The spelling of 121221020200200 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty million, two hundred thousand, two hundred".