31211299979 has 8 divisors (see below), whose sum is σ = 32096968848. Its totient is φ = 30331555840.

The previous prime is 31211299969. The next prime is 31211299993. The reversal of 31211299979 is 97999211213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31211299979 - 2²⁰ = 31210251403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31211299979.

It is not an unprimeable number, because it can be changed into a prime (31211299919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1470497 + ... + 1491570.

It is an arithmetic number, because the mean of its divisors is an integer number (4012121106).

Almost surely, 2^31211299979 is an apocalyptic number.

31211299979 is a deficient number, since it is larger than the sum of its proper divisors (885668869).

31211299979 is a wasteful number, since it uses less digits than its factorization.

31211299979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962365.

The product of its digits is 551124, while the sum is 53.

The spelling of 31211299979 in words is "thirty-one billion, two hundred eleven million, two hundred ninety-nine thousand, nine hundred seventy-nine".