21101311032 has 32 divisors (see below), whose sum is σ = 53748625680. Its totient is φ = 6901057280.

The previous prime is 21101311031. The next prime is 21101311051. The reversal of 21101311032 is 23011310112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101311031) 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, 8293269 + ... + 8295812.

Almost surely, 2^21101311032 is an apocalyptic number.

It is an amenable number.

21101311032 is an abundant number, since it is smaller than the sum of its proper divisors (32647314648).

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

21101311032 is a wasteful number, since it uses less digits than its factorization.

21101311032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16589143 (or 16589139 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21101311032 its reverse (23011310112), we get a palindrome (44112621144).

The spelling of 21101311032 in words is "twenty-one billion, one hundred one million, three hundred eleven thousand, thirty-two".