121221010110200 has 768 divisors, whose sum is σ = 382357927526400. Its totient is φ = 34514590924800.

The previous prime is 121221010110199. The next prime is 121221010110289. The reversal of 121221010110200 is 2011010122121.

It is a super-2 number, since 2×121221010110200² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 10398982772 + ... + 10398994428.

It is an arithmetic number, because the mean of its divisors is an integer number (497861884800).

Almost surely, 2^{121221010110200} is an apocalyptic number.

121221010110200 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 121221010110200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191178963763200).

121221010110200 is an abundant number, since it is smaller than the sum of its proper divisors (261136917416200).

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

121221010110200 is a wasteful number, since it uses less digits than its factorization.

121221010110200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12240 (or 12231 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121221010110200 its reverse (2011010122121), we get a palindrome (123232020232321).

The spelling of 121221010110200 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, ten million, one hundred ten thousand, two hundred".