2121312131212 has 12 divisors (see below), whose sum is σ = 3713411391480. Its totient is φ = 1060337447936.

The previous prime is 2121312131203. The next prime is 2121312131227.

It is a happy number.

2121312131212 is nontrivially palindromic in base 10.

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, 79639438 + ... + 79666069.

It is an arithmetic number, because the mean of its divisors is an integer number (309450949290).

Almost surely, 2^{2121312131212} is an apocalyptic number.

It is an amenable number.

2121312131212 is a deficient number, since it is larger than the sum of its proper divisors (1592099260268).

2121312131212 is a wasteful number, since it uses less digits than its factorization.

2121312131212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159308840 (or 159308838 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

Multiplying 2121312131212 by its sum of digits (22), we get a palindrome (46668866886664).

The spelling of 2121312131212 in words is "two trillion, one hundred twenty-one billion, three hundred twelve million, one hundred thirty-one thousand, two hundred twelve".