12130212112 has 20 divisors (see below), whose sum is σ = 24075513756. Its totient is φ = 5917176320.

The previous prime is 12130212103. The next prime is 12130212221. The reversal of 12130212112 is 21121203121.

It can be written as a sum of positive squares in 2 ways, for example, as 293642496 + 11836569616 = 17136^2 + 108796^2 .

It is a super-2 number, since 2×12130212112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 9244933 + ... + 9246244.

Almost surely, 2^12130212112 is an apocalyptic number.

It is an amenable number.

12130212112 is a deficient number, since it is larger than the sum of its proper divisors (11945301644).

12130212112 is a wasteful number, since it uses less digits than its factorization.

12130212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18491226 (or 18491220 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12130212112 its reverse (21121203121), we get a palindrome (33251415233).

The spelling of 12130212112 in words is "twelve billion, one hundred thirty million, two hundred twelve thousand, one hundred twelve".