21111100134 has 32 divisors (see below), whose sum is σ = 42349112064. Its totient is φ = 7015911840.

The previous prime is 21111100133. The next prime is 21111100139. The reversal of 21111100134 is 43100111112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111100133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3561297 + ... + 3567219.

It is an arithmetic number, because the mean of its divisors is an integer number (1323409752).

Almost surely, 2^21111100134 is an apocalyptic number.

21111100134 is an abundant number, since it is smaller than the sum of its proper divisors (21238011930).

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

21111100134 is a wasteful number, since it uses less digits than its factorization.

21111100134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7612.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21111100134 its reverse (43100111112), we get a palindrome (64211211246).

The spelling of 21111100134 in words is "twenty-one billion, one hundred eleven million, one hundred thousand, one hundred thirty-four".