121210020012 has 48 divisors (see below), whose sum is σ = 288898186752. Its totient is φ = 39535851840.

The previous prime is 121210020007. The next prime is 121210020013. The reversal of 121210020012 is 210020012121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 121210020012.

It is not an unprimeable number, because it can be changed into a prime (121210020013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3277062 + ... + 3313842.

It is an arithmetic number, because the mean of its divisors is an integer number (6018712224).

Almost surely, 2^121210020012 is an apocalyptic number.

121210020012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121210020012 is an abundant number, since it is smaller than the sum of its proper divisors (167688166740).

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

121210020012 is a wasteful number, since it uses less digits than its factorization.

121210020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42678 (or 42676 counting only the distinct ones).

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

Adding to 121210020012 its reverse (210020012121), we get a palindrome (331230032133).

It can be divided in two parts, 121 and 210020012, that multiplied together give a palindrome (25412421452).

The spelling of 121210020012 in words is "one hundred twenty-one billion, two hundred ten million, twenty thousand, twelve".