21131033022100 has 36 divisors (see below), whose sum is σ = 45858419678848. Its totient is φ = 8451661500000.

The previous prime is 21131033021999. The next prime is 21131033022167. The reversal of 21131033022100 is 122033013112.

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, 8265636 + ... + 10515835.

Almost surely, 2^{21131033022100} is an apocalyptic number.

21131033022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21131033022100 is an abundant number, since it is smaller than the sum of its proper divisors (24727386656748).

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

21131033022100 is a wasteful number, since it uses less digits than its factorization.

21131033022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18792736 (or 18792729 counting only the distinct ones).

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

Adding to 21131033022100 its reverse (122033013112), we get a palindrome (21253066035212).

The spelling of 21131033022100 in words is "twenty-one trillion, one hundred thirty-one billion, thirty-three million, twenty-two thousand, one hundred".