312131123223402 has 16 divisors (see below), whose sum is σ = 713442567367872. Its totient is φ = 89180320920960.

The previous prime is 312131123223347. The next prime is 312131123223419. The reversal of 312131123223402 is 204322321131213.

It is a self number, because there is not a number n which added to its sum of digits gives 312131123223402.

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, 3715846704999 + ... + 3715846705082.

It is an arithmetic number, because the mean of its divisors is an integer number (44590160460492).

Almost surely, 2^{312131123223402} is an apocalyptic number.

312131123223402 is an abundant number, since it is smaller than the sum of its proper divisors (401311444144470).

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

312131123223402 is a wasteful number, since it uses less digits than its factorization.

312131123223402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7431693410093.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 312131123223402 its reverse (204322321131213), we get a palindrome (516453444354615).

The spelling of 312131123223402 in words is "three hundred twelve trillion, one hundred thirty-one billion, one hundred twenty-three million, two hundred twenty-three thousand, four hundred two".