122670051781 has 2 divisors, whose sum is σ = 122670051782. Its totient is φ = 122670051780.

The previous prime is 122670051769. The next prime is 122670051811. The reversal of 122670051781 is 187150076221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113305618881 + 9364432900 = 336609^2 + 96770^2 .

It is a cyclic number.

It is not a de Polignac number, because 122670051781 - 2⁹ = 122670051269 is a prime.

It is a super-2 number, since 2×122670051781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122670051761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61335025890 + 61335025891.

It is an arithmetic number, because the mean of its divisors is an integer number (61335025891).

Almost surely, 2^122670051781 is an apocalyptic number.

It is an amenable number.

122670051781 is a deficient number, since it is larger than the sum of its proper divisors (1).

122670051781 is an equidigital number, since it uses as much as digits as its factorization.

122670051781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 40.

The spelling of 122670051781 in words is "one hundred twenty-two billion, six hundred seventy million, fifty-one thousand, seven hundred eighty-one".