122402021435257 has 2 divisors, whose sum is σ = 122402021435258. Its totient is φ = 122402021435256.

The previous prime is 122402021435251. The next prime is 122402021435279. The reversal of 122402021435257 is 752534120204221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120675585739536 + 1726435695721 = 10985244^2 + 1313939^2 .

It is a cyclic number.

It is not a de Polignac number, because 122402021435257 - 2³¹ = 122399873951609 is a prime.

It is a super-2 number, since 2×122402021435257² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122402021435251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61201010717628 + 61201010717629.

It is an arithmetic number, because the mean of its divisors is an integer number (61201010717629).

Almost surely, 2^{122402021435257} is an apocalyptic number.

It is an amenable number.

122402021435257 is a deficient number, since it is larger than the sum of its proper divisors (1).

122402021435257 is an equidigital number, since it uses as much as digits as its factorization.

122402021435257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 40.

Adding to 122402021435257 its reverse (752534120204221), we get a palindrome (874936141639478).

The spelling of 122402021435257 in words is "one hundred twenty-two trillion, four hundred two billion, twenty-one million, four hundred thirty-five thousand, two hundred fifty-seven".