21102111133 has 8 divisors (see below), whose sum is σ = 21245851008. Its totient is φ = 20958621744.

The previous prime is 21102111119. The next prime is 21102111137. The reversal of 21102111133 is 33111120112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21102111133 - 2⁹ = 21102110621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102111137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108016 + ... + 232102.

It is an arithmetic number, because the mean of its divisors is an integer number (2655731376).

Almost surely, 2^21102111133 is an apocalyptic number.

It is an amenable number.

21102111133 is a deficient number, since it is larger than the sum of its proper divisors (143739875).

21102111133 is a wasteful number, since it uses less digits than its factorization.

21102111133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125243.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21102111133 its reverse (33111120112), we get a palindrome (54213231245).

The spelling of 21102111133 in words is "twenty-one billion, one hundred two million, one hundred eleven thousand, one hundred thirty-three".