31013101221123 has 32 divisors (see below), whose sum is σ = 48888081331200. Its totient is φ = 17110524606336.

The previous prime is 31013101221119. The next prime is 31013101221133. The reversal of 31013101221123 is 32112210131013.

It is not a de Polignac number, because 31013101221123 - 2² = 31013101221119 is a prime.

It is a super-2 number, since 2×31013101221123² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31013101221123.

It is not an unprimeable number, because it can be changed into a prime (31013101221133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129166498 + ... + 129406376.

It is an arithmetic number, because the mean of its divisors is an integer number (1527752541600).

Almost surely, 2^{31013101221123} is an apocalyptic number.

31013101221123 is a deficient number, since it is larger than the sum of its proper divisors (17874980110077).

31013101221123 is a wasteful number, since it uses less digits than its factorization.

31013101221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452211.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31013101221123 its reverse (32112210131013), we get a palindrome (63125311352136).

The spelling of 31013101221123 in words is "thirty-one trillion, thirteen billion, one hundred one million, two hundred twenty-one thousand, one hundred twenty-three".