21112020202000 has 1280 divisors, whose sum is σ = 69344841646080. Its totient is φ = 6030194688000.

The previous prime is 21112020201931. The next prime is 21112020202027. The reversal of 21112020202000 is 20202021112.

It is a happy number.

It is a super-2 number, since 2×21112020202000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 6096452269 + ... + 6096455731.

It is an arithmetic number, because the mean of its divisors is an integer number (54175657536).

Almost surely, 2^{21112020202000} is an apocalyptic number.

21112020202000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112020202000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34672420823040).

21112020202000 is an abundant number, since it is smaller than the sum of its proper divisors (48232821444080).

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

21112020202000 is a wasteful number, since it uses less digits than its factorization.

21112020202000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609 (or 3593 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21112020202000 its reverse (20202021112), we get a palindrome (21132222223112).

The spelling of 21112020202000 in words is "twenty-one trillion, one hundred twelve billion, twenty million, two hundred two thousand".