31021100230231 has 16 divisors (see below), whose sum is σ = 31368236481504. Its totient is φ = 30675293236224.

The previous prime is 31021100230199. The next prime is 31021100230283. The reversal of 31021100230231 is 13203200112013.

It is a cyclic number.

It is not a de Polignac number, because 31021100230231 - 2⁵ = 31021100230199 is a prime.

It is a super-2 number, since 2×31021100230231² (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 = 31021100230199 and 31021100230208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021100230031) 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, 126775755 + ... + 127020211.

It is an arithmetic number, because the mean of its divisors is an integer number (1960514780094).

Almost surely, 2^{31021100230231} is an apocalyptic number.

31021100230231 is a deficient number, since it is larger than the sum of its proper divisors (347136251273).

31021100230231 is a wasteful number, since it uses less digits than its factorization.

31021100230231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247170.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31021100230231 its reverse (13203200112013), we get a palindrome (44224300342244).

The spelling of 31021100230231 in words is "thirty-one trillion, twenty-one billion, one hundred million, two hundred thirty thousand, two hundred thirty-one".