100121100 has 36 divisors (see below), whose sum is σ = 289684584. Its totient is φ = 26698880.

The previous prime is 100121039. The next prime is 100121111. The reversal of 100121100 is 1121001.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

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, 166569 + ... + 167168.

It is an arithmetic number, because the mean of its divisors is an integer number (8046794).

Almost surely, 2^100121100 is an apocalyptic number.

100121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121100 is an abundant number, since it is smaller than the sum of its proper divisors (189563484).

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

100121100 is a wasteful number, since it uses less digits than its factorization.

100121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333754 (or 333747 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 100121100 is about 10006.0531679579. The cubic root of 100121100 is about 464.3461732482.

Adding to 100121100 its reverse (1121001), we get a palindrome (101242101).

Subtracting from 100121100 its reverse (1121001), we obtain a palindrome (99000099).

The spelling of 100121100 in words is "one hundred million, one hundred twenty-one thousand, one hundred".