121200020112 has 20 divisors (see below), whose sum is σ = 313100052080. Its totient is φ = 40400006688.

The previous prime is 121200020069. The next prime is 121200020141. The reversal of 121200020112 is 211020002121.

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 3 ways as a sum of consecutive naturals, for example, 1262500162 + ... + 1262500257.

It is an arithmetic number, because the mean of its divisors is an integer number (15655002604).

Almost surely, 2^121200020112 is an apocalyptic number.

121200020112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121200020112 is an abundant number, since it is smaller than the sum of its proper divisors (191900031968).

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

121200020112 is a wasteful number, since it uses less digits than its factorization.

121200020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525000430 (or 2525000424 counting only the distinct ones).

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

Adding to 121200020112 its reverse (211020002121), we get a palindrome (332220022233).

The spelling of 121200020112 in words is "one hundred twenty-one billion, two hundred million, twenty thousand, one hundred twelve".