21100231006 has 16 divisors (see below), whose sum is σ = 33880838400. Its totient is φ = 9825441048.

The previous prime is 21100230989. The next prime is 21100231049. The reversal of 21100231006 is 60013200112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4703430 + ... + 4707913.

It is an arithmetic number, because the mean of its divisors is an integer number (2117552400).

Almost surely, 2^21100231006 is an apocalyptic number.

21100231006 is a deficient number, since it is larger than the sum of its proper divisors (12780607394).

21100231006 is a wasteful number, since it uses less digits than its factorization.

21100231006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9411423.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21100231006 its reverse (60013200112), we get a palindrome (81113431118).

The spelling of 21100231006 in words is "twenty-one billion, one hundred million, two hundred thirty-one thousand, six".