231322102221 has 24 divisors (see below), whose sum is σ = 358851708000. Its totient is φ = 132159592992.

The previous prime is 231322102201. The next prime is 231322102267. The reversal of 231322102221 is 122201223132.

It is not a de Polignac number, because 231322102221 - 2¹⁹ = 231321577933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231322102201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 666655 + ... + 952403.

It is an arithmetic number, because the mean of its divisors is an integer number (14952154500).

Almost surely, 2^231322102221 is an apocalyptic number.

231322102221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

231322102221 is a deficient number, since it is larger than the sum of its proper divisors (127529605779).

231322102221 is a wasteful number, since it uses less digits than its factorization.

231322102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291273 (or 291266 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 231322102221 its reverse (122201223132), we get a palindrome (353523325353).

The spelling of 231322102221 in words is "two hundred thirty-one billion, three hundred twenty-two million, one hundred two thousand, two hundred twenty-one".