122765500321 has 2 divisors, whose sum is σ = 122765500322. Its totient is φ = 122765500320.

The previous prime is 122765500309. The next prime is 122765500433. The reversal of 122765500321 is 123005567221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70177837921 + 52587662400 = 264911^2 + 229320^2 .

It is a cyclic number.

It is not a de Polignac number, because 122765500321 - 2¹⁵ = 122765467553 is a prime.

It is a super-2 number, since 2×122765500321² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122765500021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61382750160 + 61382750161.

It is an arithmetic number, because the mean of its divisors is an integer number (61382750161).

Almost surely, 2^122765500321 is an apocalyptic number.

It is an amenable number.

122765500321 is a deficient number, since it is larger than the sum of its proper divisors (1).

122765500321 is an equidigital number, since it uses as much as digits as its factorization.

122765500321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 122765500321 in words is "one hundred twenty-two billion, seven hundred sixty-five million, five hundred thousand, three hundred twenty-one".