13131431122312 has 8 divisors (see below), whose sum is σ = 24621433354350. Its totient is φ = 6565715561152.

The previous prime is 13131431122279. The next prime is 13131431122379. The reversal of 13131431122312 is 21322113413131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9302341400676 + 3829089721636 = 3049974^2 + 1956806^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820714445137 + ... + 820714445152.

Almost surely, 2^{13131431122312} is an apocalyptic number.

It is an amenable number.

13131431122312 is a deficient number, since it is larger than the sum of its proper divisors (11490002232038).

13131431122312 is a wasteful number, since it uses less digits than its factorization.

13131431122312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641428890295 (or 1641428890291 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

Adding to 13131431122312 its reverse (21322113413131), we get a palindrome (34453544535443).

The spelling of 13131431122312 in words is "thirteen trillion, one hundred thirty-one billion, four hundred thirty-one million, one hundred twenty-two thousand, three hundred twelve".