31211212112129 has 16 divisors (see below), whose sum is σ = 35823453958656. Its totient is φ = 26637465211200.

The previous prime is 31211212112111. The next prime is 31211212112159. The reversal of 31211212112129 is 92121121211213.

It is a cyclic number.

It is not a de Polignac number, because 31211212112129 - 2¹⁶ = 31211212046593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31211212112159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1919942 + ... + 8130719.

It is an arithmetic number, because the mean of its divisors is an integer number (2238965872416).

Almost surely, 2^{31211212112129} is an apocalyptic number.

It is an amenable number.

31211212112129 is a deficient number, since it is larger than the sum of its proper divisors (4612241846527).

31211212112129 is a wasteful number, since it uses less digits than its factorization.

31211212112129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10052576.

The product of its digits is 864, while the sum is 29.

The spelling of 31211212112129 in words is "thirty-one trillion, two hundred eleven billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty-nine".