21103310132 has 12 divisors (see below), whose sum is σ = 37398271680. Its totient is φ = 10418089656.

The previous prime is 21103310131. The next prime is 21103310143. The reversal of 21103310132 is 23101330112.

It is a self number, because there is not a number n which added to its sum of digits gives 21103310132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103310131) 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, 33390998 + ... + 33391629.

It is an arithmetic number, because the mean of its divisors is an integer number (3116522640).

Almost surely, 2^21103310132 is an apocalyptic number.

It is an amenable number.

21103310132 is a deficient number, since it is larger than the sum of its proper divisors (16294961548).

21103310132 is a wasteful number, since it uses less digits than its factorization.

21103310132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66782710 (or 66782708 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21103310132 its reverse (23101330112), we get a palindrome (44204640244).

The spelling of 21103310132 in words is "twenty-one billion, one hundred three million, three hundred ten thousand, one hundred thirty-two".