21201312330100 has 36 divisors (see below), whose sum is σ = 52579254580384. Its totient is φ = 7269021370080.

The previous prime is 21201312330067. The next prime is 21201312330137. The reversal of 21201312330100 is 103321310212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15143793822 + ... + 15143795221.

Almost surely, 2^{21201312330100} is an apocalyptic number.

21201312330100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201312330100 is an abundant number, since it is smaller than the sum of its proper divisors (31377942250284).

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

21201312330100 is a wasteful number, since it uses less digits than its factorization.

21201312330100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30287589064 (or 30287589057 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21201312330100 its reverse (103321310212), we get a palindrome (21304633640312).

The spelling of 21201312330100 in words is "twenty-one trillion, two hundred one billion, three hundred twelve million, three hundred thirty thousand, one hundred".