100020100122 has 12 divisors (see below), whose sum is σ = 216710216970. Its totient is φ = 33340033368.

The previous prime is 100020100109. The next prime is 100020100123. The reversal of 100020100122 is 221001020001.

It can be written as a sum of positive squares in only one way, i.e., 62655596721 + 37364503401 = 250311^2 + 193299^2 .

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

It is not an unprimeable number, because it can be changed into a prime (100020100123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2778336097 + ... + 2778336132.

Almost surely, 2^100020100122 is an apocalyptic number.

100020100122 is an abundant number, since it is smaller than the sum of its proper divisors (116690116848).

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

100020100122 is a wasteful number, since it uses less digits than its factorization.

100020100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556672237 (or 5556672234 counting only the distinct ones).

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

Adding to 100020100122 its reverse (221001020001), we get a palindrome (321021120123).

The spelling of 100020100122 in words is "one hundred billion, twenty million, one hundred thousand, one hundred twenty-two".