31013101321331 has 4 divisors (see below), whose sum is σ = 31521512818464. Its totient is φ = 30504689824200.

The previous prime is 31013101321271. The next prime is 31013101321351. The reversal of 31013101321331 is 13312310131013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31013101321331 - 2²² = 31013097127027 is a prime.

It is a super-2 number, since 2×31013101321331² (a number of 28 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 = 31013101321297 and 31013101321306.

It is not an unprimeable number, because it can be changed into a prime (31013101321351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254205748475 + ... + 254205748596.

It is an arithmetic number, because the mean of its divisors is an integer number (7880378204616).

Almost surely, 2^{31013101321331} is an apocalyptic number.

31013101321331 is a deficient number, since it is larger than the sum of its proper divisors (508411497133).

31013101321331 is an equidigital number, since it uses as much as digits as its factorization.

31013101321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508411497132.

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31013101321331 its reverse (13312310131013), we get a palindrome (44325411452344).

The spelling of 31013101321331 in words is "thirty-one trillion, thirteen billion, one hundred one million, three hundred twenty-one thousand, three hundred thirty-one".