222323312021 has 8 divisors (see below), whose sum is σ = 223222172760. Its totient is φ = 221424713728.

The previous prime is 222323311961. The next prime is 222323312039. The reversal of 222323312021 is 120213323222.

It can be written as a sum of positive squares in 4 ways, for example, as 43720719025 + 178602592996 = 209095^2 + 422614^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222323312021 - 2¹⁰ = 222323310997 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 (222323312051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1731095 + ... + 1855083.

It is an arithmetic number, because the mean of its divisors is an integer number (27902771595).

Almost surely, 2^222323312021 is an apocalyptic number.

It is an amenable number.

222323312021 is a deficient number, since it is larger than the sum of its proper divisors (898860739).

222323312021 is a wasteful number, since it uses less digits than its factorization.

222323312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131223.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 222323312021 its reverse (120213323222), we get a palindrome (342536635243).

The spelling of 222323312021 in words is "two hundred twenty-two billion, three hundred twenty-three million, three hundred twelve thousand, twenty-one".