222123312021 has 16 divisors (see below), whose sum is σ = 321240879680. Its totient is φ = 135707875200.

The previous prime is 222123312007. The next prime is 222123312023. The reversal of 222123312021 is 120213321222.

It is not a de Polignac number, because 222123312021 - 2²¹ = 222121214869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222123312023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20481880 + ... + 20492721.

It is an arithmetic number, because the mean of its divisors is an integer number (20077554980).

Almost surely, 2^222123312021 is an apocalyptic number.

It is an amenable number.

222123312021 is a deficient number, since it is larger than the sum of its proper divisors (99117567659).

222123312021 is a wasteful number, since it uses less digits than its factorization.

222123312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40974756.

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

Adding to 222123312021 its reverse (120213321222), we get a palindrome (342336633243).

The spelling of 222123312021 in words is "two hundred twenty-two billion, one hundred twenty-three million, three hundred twelve thousand, twenty-one".