21534501112 has 16 divisors (see below), whose sum is σ = 40381155360. Its totient is φ = 10766193024.

The previous prime is 21534501101. The next prime is 21534501113. The reversal of 21534501112 is 21110543512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534501113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42033 + ... + 211744.

It is an arithmetic number, because the mean of its divisors is an integer number (2523822210).

Almost surely, 2^21534501112 is an apocalyptic number.

It is an amenable number.

21534501112 is a deficient number, since it is larger than the sum of its proper divisors (18846654248).

21534501112 is a wasteful number, since it uses less digits than its factorization.

21534501112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264390 (or 264386 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 21534501112 in words is "twenty-one billion, five hundred thirty-four million, five hundred one thousand, one hundred twelve".