31214231110221 has 16 divisors (see below), whose sum is σ = 43952148979200. Its totient is φ = 19650035414448.

The previous prime is 31214231110201. The next prime is 31214231110229. The reversal of 31214231110221 is 12201113241213.

It is not a de Polignac number, because 31214231110221 - 2¹³ = 31214231102029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31214231110191 and 31214231110200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31214231110229) 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, 891868641 + ... + 891903638.

It is an arithmetic number, because the mean of its divisors is an integer number (2747009311200).

Almost surely, 2^{31214231110221} is an apocalyptic number.

It is an amenable number.

31214231110221 is a deficient number, since it is larger than the sum of its proper divisors (12737917868979).

31214231110221 is a wasteful number, since it uses less digits than its factorization.

31214231110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783772608.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 31214231110221 its reverse (12201113241213), we get a palindrome (43415344351434).

The spelling of 31214231110221 in words is "thirty-one trillion, two hundred fourteen billion, two hundred thirty-one million, one hundred ten thousand, two hundred twenty-one".