121112020120 has 96 divisors (see below), whose sum is σ = 341376260400. Its totient is φ = 38329949952.

The previous prime is 121112020087. The next prime is 121112020121. The reversal of 121112020120 is 21020211121.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 121112020120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112020121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2351130 + ... + 2402089.

Almost surely, 2^121112020120 is an apocalyptic number.

121112020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121112020120 is an abundant number, since it is smaller than the sum of its proper divisors (220264240280).

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

121112020120 is a wasteful number, since it uses less digits than its factorization.

121112020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4753257 (or 4753246 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121112020120 its reverse (21020211121), we get a palindrome (142132231241).

The spelling of 121112020120 in words is "one hundred twenty-one billion, one hundred twelve million, twenty thousand, one hundred twenty".