121021120200 has 96 divisors (see below), whose sum is σ = 375333075360. Its totient is φ = 32257881600.

The previous prime is 121021120169. The next prime is 121021120229. The reversal of 121021120200 is 2021120121.

It is a super-2 number, since 2×121021120200² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1334295 + ... + 1422105.

It is an arithmetic number, because the mean of its divisors is an integer number (3909719535).

Almost surely, 2^121021120200 is an apocalyptic number.

121021120200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021120200 is an abundant number, since it is smaller than the sum of its proper divisors (254311955160).

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

121021120200 is a wasteful number, since it uses less digits than its factorization.

121021120200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90127 (or 90118 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121021120200 its reverse (2021120121), we get a palindrome (123042240321).

The spelling of 121021120200 in words is "one hundred twenty-one billion, twenty-one million, one hundred twenty thousand, two hundred".