231320221022 has 64 divisors (see below), whose sum is σ = 402221749248. Its totient is φ = 98742336000.

The previous prime is 231320221019. The next prime is 231320221039. The reversal of 231320221022 is 220122023132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231320220985 and 231320221003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8644808 + ... + 8671524.

It is an arithmetic number, because the mean of its divisors is an integer number (6284714832).

Almost surely, 2^231320221022 is an apocalyptic number.

231320221022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231320221022 is a deficient number, since it is larger than the sum of its proper divisors (170901528226).

231320221022 is a wasteful number, since it uses less digits than its factorization.

231320221022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27065.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 231320221022 its reverse (220122023132), we get a palindrome (451442244154).

The spelling of 231320221022 in words is "two hundred thirty-one billion, three hundred twenty million, two hundred twenty-one thousand, twenty-two".