121211012112 has 80 divisors (see below), whose sum is σ = 334482073920. Its totient is φ = 37690433536.

The previous prime is 121211012053. The next prime is 121211012147. The reversal of 121211012112 is 211210112121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121211012091 and 121211012100.

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, 565062 + ... + 749477.

It is an arithmetic number, because the mean of its divisors is an integer number (4181025924).

Almost surely, 2^121211012112 is an apocalyptic number.

121211012112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121211012112 is an abundant number, since it is smaller than the sum of its proper divisors (213271061808).

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

121211012112 is a wasteful number, since it uses less digits than its factorization.

121211012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314680 (or 1314674 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121211012112 its reverse (211210112121), we get a palindrome (332421124233).

The spelling of 121211012112 in words is "one hundred twenty-one billion, two hundred eleven million, twelve thousand, one hundred twelve".