21220022202220 has 12 divisors (see below), whose sum is σ = 44562046624704. Its totient is φ = 8488008880880.

The previous prime is 21220022202191. The next prime is 21220022202221. The reversal of 21220022202220 is 2220222002212.

It is not an unprimeable number, because it can be changed into a prime (21220022202221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530500555036 + ... + 530500555075.

It is an arithmetic number, because the mean of its divisors is an integer number (3713503885392).

Almost surely, 2^{21220022202220} is an apocalyptic number.

21220022202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220022202220 is an abundant number, since it is smaller than the sum of its proper divisors (23342024422484).

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

21220022202220 is a wasteful number, since it uses less digits than its factorization.

21220022202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061001110120 (or 1061001110118 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 21220022202220 its reverse (2220222002212), we get a palindrome (23440244204432).

The spelling of 21220022202220 in words is "twenty-one trillion, two hundred twenty billion, twenty-two million, two hundred two thousand, two hundred twenty".