122102232120821 has 2 divisors, whose sum is σ = 122102232120822. Its totient is φ = 122102232120820.

The previous prime is 122102232120763. The next prime is 122102232120839. The reversal of 122102232120821 is 128021232201221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108008109363025 + 14094122757796 = 10392695^2 + 3754214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122102232120821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122102232120871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61051116060410 + 61051116060411.

It is an arithmetic number, because the mean of its divisors is an integer number (61051116060411).

Almost surely, 2^{122102232120821} is an apocalyptic number.

It is an amenable number.

122102232120821 is a deficient number, since it is larger than the sum of its proper divisors (1).

122102232120821 is an equidigital number, since it uses as much as digits as its factorization.

122102232120821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The spelling of 122102232120821 in words is "one hundred twenty-two trillion, one hundred two billion, two hundred thirty-two million, one hundred twenty thousand, eight hundred twenty-one".