12120211312 has 40 divisors (see below), whose sum is σ = 25632613872. Its totient is φ = 5505984000.

The previous prime is 12120211277. The next prime is 12120211331. The reversal of 12120211312 is 21311202121.

It is a super-2 number, since 2×12120211312² (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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297858 + ... + 336094.

Almost surely, 2^12120211312 is an apocalyptic number.

It is an amenable number.

12120211312 is an abundant number, since it is smaller than the sum of its proper divisors (13512402560).

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

12120211312 is a wasteful number, since it uses less digits than its factorization.

12120211312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40057 (or 40051 counting only the distinct ones).

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

Adding to 12120211312 its reverse (21311202121), we get a palindrome (33431413433).

The spelling of 12120211312 in words is "twelve billion, one hundred twenty million, two hundred eleven thousand, three hundred twelve".