231222112021 has 4 divisors (see below), whose sum is σ = 231237921600. Its totient is φ = 231206302444.

The previous prime is 231222112013. The next prime is 231222112063. The reversal of 231222112021 is 120211222132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231222112021 - 2³ = 231222112013 is a prime.

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 231222112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231222112001) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7882831 + ... + 7912108.

It is an arithmetic number, because the mean of its divisors is an integer number (57809480400).

Almost surely, 2^231222112021 is an apocalyptic number.

It is an amenable number.

231222112021 is a deficient number, since it is larger than the sum of its proper divisors (15809579).

231222112021 is a wasteful number, since it uses less digits than its factorization.

231222112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15809578.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 231222112021 its reverse (120211222132), we get a palindrome (351433334153).

The spelling of 231222112021 in words is "two hundred thirty-one billion, two hundred twenty-two million, one hundred twelve thousand, twenty-one".