21202222110220 has 12 divisors (see below), whose sum is σ = 44524666431504. Its totient is φ = 8480888844080.

The previous prime is 21202222110211. The next prime is 21202222110239. The reversal of 21202222110220 is 2201122220212.

It is a super-2 number, since 2×21202222110220² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530055552736 + ... + 530055552775.

It is an arithmetic number, because the mean of its divisors is an integer number (3710388869292).

Almost surely, 2^{21202222110220} is an apocalyptic number.

21202222110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202222110220 is an abundant number, since it is smaller than the sum of its proper divisors (23322444321284).

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

21202222110220 is a wasteful number, since it uses less digits than its factorization.

21202222110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060111105520 (or 1060111105518 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21202222110220 its reverse (2201122220212), we get a palindrome (23403344330432).

The spelling of 21202222110220 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, one hundred ten thousand, two hundred twenty".