122345122321021 has 2 divisors, whose sum is σ = 122345122321022. Its totient is φ = 122345122321020.

The previous prime is 122345122321007. The next prime is 122345122321031. The reversal of 122345122321021 is 120123221543221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110453583896100 + 11891538424921 = 10509690^2 + 3448411^2 .

It is a cyclic number.

It is not a de Polignac number, because 122345122321021 - 2³⁵ = 122310762582653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122345122321001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61172561160510 + 61172561160511.

It is an arithmetic number, because the mean of its divisors is an integer number (61172561160511).

Almost surely, 2^{122345122321021} is an apocalyptic number.

It is an amenable number.

122345122321021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122345122321021 is an equidigital number, since it uses as much as digits as its factorization.

122345122321021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 122345122321021 its reverse (120123221543221), we get a palindrome (242468343864242).

The spelling of 122345122321021 in words is "one hundred twenty-two trillion, three hundred forty-five billion, one hundred twenty-two million, three hundred twenty-one thousand, twenty-one".