122540402069 has 2 divisors, whose sum is σ = 122540402070. Its totient is φ = 122540402068.

The previous prime is 122540402063. The next prime is 122540402113. The reversal of 122540402069 is 960204045221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119534073169 + 3006328900 = 345737^2 + 54830^2 .

It is a cyclic number.

It is not a de Polignac number, because 122540402069 - 2¹⁶ = 122540336533 is a prime.

It is a super-2 number, since 2×122540402069² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122540402063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61270201034 + 61270201035.

It is an arithmetic number, because the mean of its divisors is an integer number (61270201035).

Almost surely, 2^122540402069 is an apocalyptic number.

It is an amenable number.

122540402069 is a deficient number, since it is larger than the sum of its proper divisors (1).

122540402069 is an equidigital number, since it uses as much as digits as its factorization.

122540402069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 122540402069 in words is "one hundred twenty-two billion, five hundred forty million, four hundred two thousand, sixty-nine".