21133031202020 has 48 divisors (see below), whose sum is σ = 45880654487808. Its totient is φ = 8170278710400.

The previous prime is 21133031201987. The next prime is 21133031202053. The reversal of 21133031202020 is 2020213033112.

It is an interprime number because it is at equal distance from previous prime (21133031201987) and next prime (21133031202053).

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 = 21133031201983 and 21133031202001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94451672 + ... + 94675151.

It is an arithmetic number, because the mean of its divisors is an integer number (955846968496).

Almost surely, 2^{21133031202020} is an apocalyptic number.

21133031202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21133031202020 is an abundant number, since it is smaller than the sum of its proper divisors (24747623285788).

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

21133031202020 is a wasteful number, since it uses less digits than its factorization.

21133031202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189127020 (or 189127018 counting only the distinct ones).

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

Adding to 21133031202020 its reverse (2020213033112), we get a palindrome (23153244235132).

The spelling of 21133031202020 in words is "twenty-one trillion, one hundred thirty-three billion, thirty-one million, two hundred two thousand, twenty".