231322310221 has 8 divisors (see below), whose sum is σ = 231596248320. Its totient is φ = 231048436608.

The previous prime is 231322310171. The next prime is 231322310267. The reversal of 231322310221 is 122013223132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231322310221 - 2³³ = 222732375629 is a prime.

It is a super-2 number, since 2×231322310221² (a number of 24 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 = 231322310192 and 231322310201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231322311221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14082205 + ... + 14098621.

It is an arithmetic number, because the mean of its divisors is an integer number (28949531040).

Almost surely, 2^231322310221 is an apocalyptic number.

It is an amenable number.

231322310221 is a deficient number, since it is larger than the sum of its proper divisors (273938099).

231322310221 is a wasteful number, since it uses less digits than its factorization.

231322310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32243.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 231322310221 its reverse (122013223132), we get a palindrome (353335533353).

The spelling of 231322310221 in words is "two hundred thirty-one billion, three hundred twenty-two million, three hundred ten thousand, two hundred twenty-one".