121021120121200 has 60 divisors (see below), whose sum is σ = 313118875034728. Its totient is φ = 44684721273600.

The previous prime is 121021120121177. The next prime is 121021120121203. The reversal of 121021120121200 is 2121021120121.

It is a super-2 number, since 2×121021120121200² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021120121203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11636640966 + ... + 11636651365.

Almost surely, 2^{121021120121200} is an apocalyptic number.

121021120121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021120121200 is an abundant number, since it is smaller than the sum of its proper divisors (192097754913528).

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

121021120121200 is a wasteful number, since it uses less digits than its factorization.

121021120121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23273292362 (or 23273292351 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121021120121200 its reverse (2121021120121), we get a palindrome (123142141241321).

The spelling of 121021120121200 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, two hundred".