21100003144 has 16 divisors (see below), whose sum is σ = 43159097520. Its totient is φ = 9590910480.

The previous prime is 21100003117. The next prime is 21100003157. The reversal of 21100003144 is 44130000112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119886294 + ... + 119886469.

It is an arithmetic number, because the mean of its divisors is an integer number (2697443595).

Almost surely, 2^21100003144 is an apocalyptic number.

It is an amenable number.

21100003144 is an abundant number, since it is smaller than the sum of its proper divisors (22059094376).

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

21100003144 is a wasteful number, since it uses less digits than its factorization.

21100003144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239772780 (or 239772776 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21100003144 its reverse (44130000112), we get a palindrome (65230003256).

The spelling of 21100003144 in words is "twenty-one billion, one hundred million, three thousand, one hundred forty-four".