31310220221113 has 16 divisors (see below), whose sum is σ = 32987195781120. Its totient is φ = 29636156933136.

The previous prime is 31310220221089. The next prime is 31310220221183. The reversal of 31310220221113 is 31112202201313.

It is a cyclic number.

It is not a de Polignac number, because 31310220221113 - 2⁵ = 31310220221081 is a prime.

It is a super-2 number, since 2×31310220221113² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31310220221183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226581720 + ... + 226719862.

It is an arithmetic number, because the mean of its divisors is an integer number (2061699736320).

Almost surely, 2^{31310220221113} is an apocalyptic number.

It is an amenable number.

31310220221113 is a deficient number, since it is larger than the sum of its proper divisors (1676975560007).

31310220221113 is a wasteful number, since it uses less digits than its factorization.

31310220221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148596.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31310220221113 its reverse (31112202201313), we get a palindrome (62422422422426).

The spelling of 31310220221113 in words is "thirty-one trillion, three hundred ten billion, two hundred twenty million, two hundred twenty-one thousand, one hundred thirteen".