121211320300200 has 1152 divisors, whose sum is σ = 451968689652480. Its totient is φ = 28927210291200.

The previous prime is 121211320300183. The next prime is 121211320300201. The reversal of 121211320300200 is 2003023112121.

121211320300200 is a `hidden beast` number, since 1 + 2 + 1 + 21 + 1 + 320 + 300 + 20 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121211320300201) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 41753811949 + ... + 41753814851.

It is an arithmetic number, because the mean of its divisors is an integer number (392333931990).

Almost surely, 2^{121211320300200} is an apocalyptic number.

121211320300200 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 121211320300200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225984344826240).

121211320300200 is an abundant number, since it is smaller than the sum of its proper divisors (330757369352280).

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

121211320300200 is a wasteful number, since it uses less digits than its factorization.

121211320300200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3379 (or 3367 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121211320300200 its reverse (2003023112121), we get a palindrome (123214343412321).

The spelling of 121211320300200 in words is "one hundred twenty-one trillion, two hundred eleven billion, three hundred twenty million, three hundred thousand, two hundred".