21022200032220 has 72 divisors (see below), whose sum is σ = 63992666542896. Its totient is φ = 5586111090432.

The previous prime is 21022200032201. The next prime is 21022200032227. The reversal of 21022200032220 is 2223000222012.

21022200032220 is a `hidden beast` number, since 2 + 102 + 220 + 0 + 0 + 322 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21022200032193 and 21022200032202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022200032227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 206291817 + ... + 206393696.

It is an arithmetic number, because the mean of its divisors is an integer number (888787035318).

Almost surely, 2^{21022200032220} is an apocalyptic number.

21022200032220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022200032220 is an abundant number, since it is smaller than the sum of its proper divisors (42970466510676).

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

21022200032220 is a wasteful number, since it uses less digits than its factorization.

21022200032220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412685811 (or 412685806 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21022200032220 its reverse (2223000222012), we get a palindrome (23245200254232).

The spelling of 21022200032220 in words is "twenty-one trillion, twenty-two billion, two hundred million, thirty-two thousand, two hundred twenty".