122897790100 has 18 divisors (see below), whose sum is σ = 266688204734. Its totient is φ = 49159116000.

The previous prime is 122897790097. The next prime is 122897790101. The reversal of 122897790100 is 1097798221.

It can be written as a sum of positive squares in 3 ways, for example, as 7398408196 + 115499381904 = 86014^2 + 339852^2 .

It is a super-2 number, since 2×122897790100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122897790101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 614488851 + ... + 614489050.

Almost surely, 2^122897790100 is an apocalyptic number.

122897790100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122897790100 is an abundant number, since it is smaller than the sum of its proper divisors (143790414634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122897790100 is a wasteful number, since it uses less digits than its factorization.

122897790100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228977915 (or 1228977908 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 46.

The spelling of 122897790100 in words is "one hundred twenty-two billion, eight hundred ninety-seven million, seven hundred ninety thousand, one hundred".