21022200120220 has 96 divisors (see below), whose sum is σ = 47614801328640. Its totient is φ = 7750247792640.

The previous prime is 21022200120203. The next prime is 21022200120223. The reversal of 21022200120220 is 2202100222012.

It is a junction number, because it is equal to n+sod(n) for n = 21022200120194 and 21022200120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022200120223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 682324176 + ... + 682354984.

It is an arithmetic number, because the mean of its divisors is an integer number (495987513840).

Almost surely, 2^{21022200120220} is an apocalyptic number.

21022200120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022200120220 is an abundant number, since it is smaller than the sum of its proper divisors (26592601208420).

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

21022200120220 is a wasteful number, since it uses less digits than its factorization.

21022200120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34735 (or 34733 counting only the distinct ones).

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

Adding to 21022200120220 its reverse (2202100222012), we get a palindrome (23224300342232).

The spelling of 21022200120220 in words is "twenty-one trillion, twenty-two billion, two hundred million, one hundred twenty thousand, two hundred twenty".