312131123211431 has 16 divisors (see below), whose sum is σ = 326354659580160. Its totient is φ = 297962076170880.

The previous prime is 312131123211379. The next prime is 312131123211473. The reversal of 312131123211431 is 134112321131213.

It is a cyclic number.

It is not a de Polignac number, because 312131123211431 - 2⁴² = 307733076700327 is a prime.

It is a super-2 number, since 2×312131123211431² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312131123211394 and 312131123211403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312131123214431) 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, 130884671 + ... + 133248111.

It is an arithmetic number, because the mean of its divisors is an integer number (20397166223760).

Almost surely, 2^{312131123211431} is an apocalyptic number.

312131123211431 is a deficient number, since it is larger than the sum of its proper divisors (14223536368729).

312131123211431 is a wasteful number, since it uses less digits than its factorization.

312131123211431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374966.

The product of its digits is 2592, while the sum is 29.

Adding to 312131123211431 its reverse (134112321131213), we get a palindrome (446243444342644).

The spelling of 312131123211431 in words is "three hundred twelve trillion, one hundred thirty-one billion, one hundred twenty-three million, two hundred eleven thousand, four hundred thirty-one".