31300131221023 has 4 divisors (see below), whose sum is σ = 35771578538320. Its totient is φ = 26828683903728.

The previous prime is 31300131221011. The next prime is 31300131221033. The reversal of 31300131221023 is 32012213100313.

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

It is not a de Polignac number, because 31300131221023 - 2¹⁷ = 31300131089951 is a prime.

It is a super-3 number, since 3×31300131221023³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31300131220985 and 31300131221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31300131221033) 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, 2235723658638 + ... + 2235723658651.

It is an arithmetic number, because the mean of its divisors is an integer number (8942894634580).

Almost surely, 2^{31300131221023} is an apocalyptic number.

31300131221023 is a deficient number, since it is larger than the sum of its proper divisors (4471447317297).

31300131221023 is an equidigital number, since it uses as much as digits as its factorization.

31300131221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4471447317296.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31300131221023 its reverse (32012213100313), we get a palindrome (63312344321336).

The spelling of 31300131221023 in words is "thirty-one trillion, three hundred billion, one hundred thirty-one million, two hundred twenty-one thousand, twenty-three".