12121012112 has 20 divisors (see below), whose sum is σ = 25619412336. Its totient is φ = 5509550880.

The previous prime is 12121012091. The next prime is 12121012139. The reversal of 12121012112 is 21121012121.

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, 34434518 + ... + 34434869.

Almost surely, 2^12121012112 is an apocalyptic number.

It is an amenable number.

12121012112 is an abundant number, since it is smaller than the sum of its proper divisors (13498400224).

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

12121012112 is a wasteful number, since it uses less digits than its factorization.

12121012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68869406 (or 68869400 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12121012112 its reverse (21121012121), we get a palindrome (33242024233).

Subtracting 12121012112 from its reverse (21121012121), we obtain a palindrome (9000000009).

The spelling of 12121012112 in words is "twelve billion, one hundred twenty-one million, twelve thousand, one hundred twelve".