122312320421 has 2 divisors, whose sum is σ = 122312320422. Its totient is φ = 122312320420.

The previous prime is 122312320321. The next prime is 122312320433. The reversal of 122312320421 is 124023213221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64671033025 + 57641287396 = 254305^2 + 240086^2 .

It is a cyclic number.

It is not a de Polignac number, because 122312320421 - 2²² = 122308126117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122312320021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61156160210 + 61156160211.

It is an arithmetic number, because the mean of its divisors is an integer number (61156160211).

Almost surely, 2^122312320421 is an apocalyptic number.

It is an amenable number.

122312320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

122312320421 is an equidigital number, since it uses as much as digits as its factorization.

122312320421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 122312320421 its reverse (124023213221), we get a palindrome (246335533642).

The spelling of 122312320421 in words is "one hundred twenty-two billion, three hundred twelve million, three hundred twenty thousand, four hundred twenty-one".