221331231023 has 16 divisors (see below), whose sum is σ = 268421506560. Its totient is φ = 178388444256.

The previous prime is 221331231001. The next prime is 221331231029. The reversal of 221331231023 is 320132133122.

221331231023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 221331231023 - 2⁸ = 221331230767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221331231023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331231029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11640740 + ... + 11659737.

It is an arithmetic number, because the mean of its divisors is an integer number (16776344160).

Almost surely, 2^221331231023 is an apocalyptic number.

221331231023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221331231023 is a deficient number, since it is larger than the sum of its proper divisors (47090275537).

221331231023 is a wasteful number, since it uses less digits than its factorization.

221331231023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23300566.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 221331231023 its reverse (320132133122), we get a palindrome (541463364145).

The spelling of 221331231023 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred thirty-one thousand, twenty-three".