121200021000012 has 48 divisors (see below), whose sum is σ = 287610183262080. Its totient is φ = 39712925501568.

The previous prime is 121200020999899. The next prime is 121200021000031. The reversal of 121200021000012 is 210000120002121.

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 15 ways as a sum of consecutive naturals, for example, 7034223 + ... + 17084505.

It is an arithmetic number, because the mean of its divisors is an integer number (5991878817960).

Almost surely, 2^{121200021000012} is an apocalyptic number.

121200021000012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121200021000012 is an abundant number, since it is smaller than the sum of its proper divisors (166410162262068).

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

121200021000012 is a wasteful number, since it uses less digits than its factorization.

121200021000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10067382 (or 10067380 counting only the distinct ones).

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

Adding to 121200021000012 its reverse (210000120002121), we get a palindrome (331200141002133).

The spelling of 121200021000012 in words is "one hundred twenty-one trillion, two hundred billion, twenty-one million, twelve", and thus it is an aban number.