21200122022020 has 48 divisors (see below), whose sum is σ = 46582502819328. Its totient is φ = 8089249196160.

The previous prime is 21200122021999. The next prime is 21200122022021. The reversal of 21200122022020 is 2022022100212.

It is a junction number, because it is equal to n+sod(n) for n = 21200122021985 and 21200122022003.

It is not an unprimeable number, because it can be changed into a prime (21200122022021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62620311 + ... + 62957950.

It is an arithmetic number, because the mean of its divisors is an integer number (970468808736).

Almost surely, 2^{21200122022020} is an apocalyptic number.

21200122022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200122022020 is an abundant number, since it is smaller than the sum of its proper divisors (25382380797308).

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

21200122022020 is a wasteful number, since it uses less digits than its factorization.

21200122022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125578660 (or 125578658 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21200122022020 its reverse (2022022100212), we get a palindrome (23222144122232).

The spelling of 21200122022020 in words is "twenty-one trillion, two hundred billion, one hundred twenty-two million, twenty-two thousand, twenty".