20100100122 has 24 divisors (see below), whose sum is σ = 43574468340. Its totient is φ = 6696302400.

The previous prime is 20100100087. The next prime is 20100100147. The reversal of 20100100122 is 22100100102.

It can be written as a sum of positive squares in 2 ways, for example, as 20099016441 + 1083681 = 141771^2 + 1041^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 277597 + ... + 342432.

Almost surely, 2^20100100122 is an apocalyptic number.

20100100122 is an abundant number, since it is smaller than the sum of its proper divisors (23474368218).

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

20100100122 is a wasteful number, since it uses less digits than its factorization.

20100100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621838 (or 621835 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20100100122 its reverse (22100100102), we get a palindrome (42200200224).

The spelling of 20100100122 in words is "twenty billion, one hundred million, one hundred thousand, one hundred twenty-two".