222321123257 has 2 divisors, whose sum is σ = 222321123258. Its totient is φ = 222321123256.

The previous prime is 222321123163. The next prime is 222321123287. The reversal of 222321123257 is 752321123222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188053189801 + 34267933456 = 433651^2 + 185116^2 .

It is a cyclic number.

It is not a de Polignac number, because 222321123257 - 2³⁶ = 153601646521 is a prime.

It is not a weakly prime, because it can be changed into another prime (222321123287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111160561628 + 111160561629.

It is an arithmetic number, because the mean of its divisors is an integer number (111160561629).

Almost surely, 2^222321123257 is an apocalyptic number.

It is an amenable number.

222321123257 is a deficient number, since it is larger than the sum of its proper divisors (1).

222321123257 is an equidigital number, since it uses as much as digits as its factorization.

222321123257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

Adding to 222321123257 its reverse (752321123222), we get a palindrome (974642246479).

The spelling of 222321123257 in words is "two hundred twenty-two billion, three hundred twenty-one million, one hundred twenty-three thousand, two hundred fifty-seven".