21031133200220 has 192 divisors, whose sum is σ = 56379332136960. Its totient is φ = 6472116172800.

The previous prime is 21031133200199. The next prime is 21031133200247. The reversal of 21031133200220 is 2200233113012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21031133200192 and 21031133200201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4557857 + ... + 7926936.

It is an arithmetic number, because the mean of its divisors is an integer number (293642354880).

Almost surely, 2^{21031133200220} is an apocalyptic number.

21031133200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21031133200220 is an abundant number, since it is smaller than the sum of its proper divisors (35348198936740).

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

21031133200220 is a wasteful number, since it uses less digits than its factorization.

21031133200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12484876 (or 12484874 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21031133200220 its reverse (2200233113012), we get a palindrome (23231366313232).

The spelling of 21031133200220 in words is "twenty-one trillion, thirty-one billion, one hundred thirty-three million, two hundred thousand, two hundred twenty".