2100100122 has 40 divisors (see below), whose sum is σ = 4709380500. Its totient is φ = 699497856.

The previous prime is 2100100109. The next prime is 2100100127. The reversal of 2100100122 is 2210010012.

It can be written as a sum of positive squares in 2 ways, for example, as 2097731601 + 2368521 = 45801^2 + 1539^2 .

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 (2100100127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 246754 + ... + 255122.

Almost surely, 2^2100100122 is an apocalyptic number.

2100100122 is an abundant number, since it is smaller than the sum of its proper divisors (2609280378).

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

2100100122 is a wasteful number, since it uses less digits than its factorization.

2100100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9932 (or 9923 counting only the distinct ones).

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

The square root of 2100100122 is about 45826.8493571181. The cubic root of 2100100122 is about 1280.5995161160.

Adding to 2100100122 its reverse (2210010012), we get a palindrome (4310110134).

It can be divided in two parts, 210010012 and 2, that multiplied together give a palindrome (420020024).

The spelling of 2100100122 in words is "two billion, one hundred million, one hundred thousand, one hundred twenty-two".