222120023231 has 2 divisors, whose sum is σ = 222120023232. Its totient is φ = 222120023230.

The previous prime is 222120023221. The next prime is 222120023249. The reversal of 222120023231 is 132320021222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222120023231 is a prime.

It is a super-2 number, since 2×222120023231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222120023221) 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 as a sum of consecutive naturals, namely, 111060011615 + 111060011616.

It is an arithmetic number, because the mean of its divisors is an integer number (111060011616).

Almost surely, 2^222120023231 is an apocalyptic number.

222120023231 is a deficient number, since it is larger than the sum of its proper divisors (1).

222120023231 is an equidigital number, since it uses as much as digits as its factorization.

222120023231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 222120023231 its reverse (132320021222), we get a palindrome (354440044453).

The spelling of 222120023231 in words is "two hundred twenty-two billion, one hundred twenty million, twenty-three thousand, two hundred thirty-one".