21022021020220 has 24 divisors (see below), whose sum is σ = 48159539065008. Its totient is φ = 7644371280000.

The previous prime is 21022021020181. The next prime is 21022021020227. The reversal of 21022021020220 is 2202012022012.

It is a junction number, because it is equal to n+sod(n) for n = 21022021020194 and 21022021020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022021020227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47777320281 + ... + 47777320720.

It is an arithmetic number, because the mean of its divisors is an integer number (2006647461042).

Almost surely, 2^{21022021020220} is an apocalyptic number.

21022021020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022021020220 is an abundant number, since it is smaller than the sum of its proper divisors (27137518044788).

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

21022021020220 is a wasteful number, since it uses less digits than its factorization.

21022021020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95554641021 (or 95554641019 counting only the distinct ones).

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

Adding to 21022021020220 its reverse (2202012022012), we get a palindrome (23224033042232).

The spelling of 21022021020220 in words is "twenty-one trillion, twenty-two billion, twenty-one million, twenty thousand, two hundred twenty".