331221010231 has 16 divisors (see below), whose sum is σ = 350554312960. Its totient is φ = 312079884480.

The previous prime is 331221010177. The next prime is 331221010259. The reversal of 331221010231 is 132010122133.

It is a cyclic number.

It is not a de Polignac number, because 331221010231 - 2³¹ = 329073526583 is a prime.

It is a super-2 number, since 2×331221010231² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331221010199 and 331221010208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331221019231) 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, 5772475 + ... + 5829571.

It is an arithmetic number, because the mean of its divisors is an integer number (21909644560).

Almost surely, 2^331221010231 is an apocalyptic number.

331221010231 is a deficient number, since it is larger than the sum of its proper divisors (19333302729).

331221010231 is a wasteful number, since it uses less digits than its factorization.

331221010231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58774.

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

Adding to 331221010231 its reverse (132010122133), we get a palindrome (463231132364).

The spelling of 331221010231 in words is "three hundred thirty-one billion, two hundred twenty-one million, ten thousand, two hundred thirty-one".