122959515505 has 4 divisors (see below), whose sum is σ = 147551418612. Its totient is φ = 98367612400.

The previous prime is 122959515491. The next prime is 122959515541. The reversal of 122959515505 is 505515959221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83345380416 + 39614135089 = 288696^2 + 199033^2 .

It is not a de Polignac number, because 122959515505 - 2¹⁹ = 122958991217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12295951546 + ... + 12295951555.

It is an arithmetic number, because the mean of its divisors is an integer number (36887854653).

Almost surely, 2^122959515505 is an apocalyptic number.

It is an amenable number.

122959515505 is a deficient number, since it is larger than the sum of its proper divisors (24591903107).

122959515505 is an equidigital number, since it uses as much as digits as its factorization.

122959515505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24591903106.

The product of its (nonzero) digits is 1012500, while the sum is 49.

The spelling of 122959515505 in words is "one hundred twenty-two billion, nine hundred fifty-nine million, five hundred fifteen thousand, five hundred five".