21332130100 has 36 divisors (see below), whose sum is σ = 46457897164. Its totient is φ = 8502036480.

The previous prime is 21332130089. The next prime is 21332130103. The reversal of 21332130100 is 103123312.

It can be written as a sum of positive squares in 6 ways, for example, as 5869704996 + 15462425104 = 76614^2 + 124348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332130103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 357357 + ... + 412756.

Almost surely, 2^21332130100 is an apocalyptic number.

21332130100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21332130100 is an abundant number, since it is smaller than the sum of its proper divisors (25125767064).

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

21332130100 is a wasteful number, since it uses less digits than its factorization.

21332130100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770404 (or 770397 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21332130100 its reverse (103123312), we get a palindrome (21435253412).

The spelling of 21332130100 in words is "twenty-one billion, three hundred thirty-two million, one hundred thirty thousand, one hundred".