122290712821 has 2 divisors, whose sum is σ = 122290712822. Its totient is φ = 122290712820.

The previous prime is 122290712801. The next prime is 122290712827. The reversal of 122290712821 is 128217092221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119511947025 + 2778765796 = 345705^2 + 52714^2 .

It is a cyclic number.

It is not a de Polignac number, because 122290712821 - 2²⁵ = 122257158389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122290712827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61145356410 + 61145356411.

It is an arithmetic number, because the mean of its divisors is an integer number (61145356411).

Almost surely, 2^122290712821 is an apocalyptic number.

It is an amenable number.

122290712821 is a deficient number, since it is larger than the sum of its proper divisors (1).

122290712821 is an equidigital number, since it uses as much as digits as its factorization.

122290712821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The spelling of 122290712821 in words is "one hundred twenty-two billion, two hundred ninety million, seven hundred twelve thousand, eight hundred twenty-one".