122139645029 has 2 divisors, whose sum is σ = 122139645030. Its totient is φ = 122139645028.

The previous prime is 122139644993. The next prime is 122139645097. The reversal of 122139645029 is 920546931221.

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., 120485352100 + 1654292929 = 347110^2 + 40673^2 .

It is a cyclic number.

It is not a de Polignac number, because 122139645029 - 2¹⁶ = 122139579493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122139645829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61069822514 + 61069822515.

It is an arithmetic number, because the mean of its divisors is an integer number (61069822515).

Almost surely, 2^122139645029 is an apocalyptic number.

It is an amenable number.

122139645029 is a deficient number, since it is larger than the sum of its proper divisors (1).

122139645029 is an equidigital number, since it uses as much as digits as its factorization.

122139645029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 122139645029 in words is "one hundred twenty-two billion, one hundred thirty-nine million, six hundred forty-five thousand, twenty-nine".