13331021312431 has 8 divisors (see below), whose sum is σ = 13350048782400. Its totient is φ = 13311995195040.

The previous prime is 13331021312423. The next prime is 13331021312443. The reversal of 13331021312431 is 13421312013331.

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 13331021312431 - 2³ = 13331021312423 is a prime.

It is a super-2 number, since 2×13331021312431² (a number of 27 digits) contains 22 as substring.

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 13331021312431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331021322431) 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, 20283805 + ... + 20930713.

It is an arithmetic number, because the mean of its divisors is an integer number (1668756097800).

Almost surely, 2^{13331021312431} is an apocalyptic number.

13331021312431 is a deficient number, since it is larger than the sum of its proper divisors (19027469969).

13331021312431 is an equidigital number, since it uses as much as digits as its factorization.

13331021312431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676289.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 13331021312431 its reverse (13421312013331), we get a palindrome (26752333325762).

It can be divided in two parts, 1333 and 1021312431, that added together give a square (1021313764 = 31958²).

The spelling of 13331021312431 in words is "thirteen trillion, three hundred thirty-one billion, twenty-one million, three hundred twelve thousand, four hundred thirty-one".