122155370681 has 2 divisors, whose sum is σ = 122155370682. Its totient is φ = 122155370680.

The previous prime is 122155370677. The next prime is 122155370737. The reversal of 122155370681 is 186073551221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108383174656 + 13772196025 = 329216^2 + 117355^2 .

It is a cyclic number.

It is not a de Polignac number, because 122155370681 - 2² = 122155370677 is a prime.

It is a super-2 number, since 2×122155370681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122155370581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61077685340 + 61077685341.

It is an arithmetic number, because the mean of its divisors is an integer number (61077685341).

Almost surely, 2^122155370681 is an apocalyptic number.

It is an amenable number.

122155370681 is a deficient number, since it is larger than the sum of its proper divisors (1).

122155370681 is an equidigital number, since it uses as much as digits as its factorization.

122155370681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 122155370681 in words is "one hundred twenty-two billion, one hundred fifty-five million, three hundred seventy thousand, six hundred eighty-one".