122707988209 has 9 divisors (see below), whose sum is σ = 123144250593. Its totient is φ = 122273269632.

The previous prime is 122707988189. The next prime is 122707988219. The reversal of 122707988209 is 902889707221.

The square root of 122707988209 is 350297.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 17514225 + 122690473984 = 4185^2 + 350272^2 .

It is not a de Polignac number, because 122707988209 - 2²¹ = 122705891057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122707988209.

It is not an unprimeable number, because it can be changed into a prime (122707988219) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 151678197 + ... + 151679005.

Almost surely, 2^122707988209 is an apocalyptic number.

122707988209 is the 350297-th square number.

122707988209 is the 175149-th centered octagonal number.

It is an amenable number.

122707988209 is a deficient number, since it is larger than the sum of its proper divisors (436262384).

122707988209 is an frugal number, since it uses more digits than its factorization.

122707988209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 55.

It can be divided in two parts, 122707 and 988209, that added together give a square (1110916 = 1054²).

The spelling of 122707988209 in words is "one hundred twenty-two billion, seven hundred seven million, nine hundred eighty-eight thousand, two hundred nine".