220322123257 has 2 divisors, whose sum is σ = 220322123258. Its totient is φ = 220322123256.

The previous prime is 220322123209. The next prime is 220322123291. The reversal of 220322123257 is 752321223022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152299745536 + 68022377721 = 390256^2 + 260811^2 .

It is a cyclic number.

It is not a de Polignac number, because 220322123257 - 2⁷ = 220322123129 is a prime.

It is not a weakly prime, because it can be changed into another prime (220322123207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110161061628 + 110161061629.

It is an arithmetic number, because the mean of its divisors is an integer number (110161061629).

Almost surely, 2^220322123257 is an apocalyptic number.

It is an amenable number.

220322123257 is a deficient number, since it is larger than the sum of its proper divisors (1).

220322123257 is an equidigital number, since it uses as much as digits as its factorization.

220322123257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 220322123257 its reverse (752321223022), we get a palindrome (972643346279).

The spelling of 220322123257 in words is "two hundred twenty billion, three hundred twenty-two million, one hundred twenty-three thousand, two hundred fifty-seven".