22220212220020 has 24 divisors (see below), whose sum is σ = 49407295407624. Its totient is φ = 8365256365056.

The previous prime is 22220212219999. The next prime is 22220212220081. The reversal of 22220212220020 is 2002221202222.

It can be written as a sum of positive squares in 4 ways, for example, as 5012682165604 + 17207530054416 = 2238902^2 + 4148196^2 .

It is a super-2 number, since 2×22220212220020² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22220212220020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32676782337 + ... + 32676783016.

It is an arithmetic number, because the mean of its divisors is an integer number (2058637308651).

Almost surely, 2^{22220212220020} is an apocalyptic number.

22220212220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220212220020 is an abundant number, since it is smaller than the sum of its proper divisors (27187083187604).

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

22220212220020 is a wasteful number, since it uses less digits than its factorization.

22220212220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65353565379 (or 65353565377 counting only the distinct ones).

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

Adding to 22220212220020 its reverse (2002221202222), we get a palindrome (24222433422242).

The spelling of 22220212220020 in words is "twenty-two trillion, two hundred twenty billion, two hundred twelve million, two hundred twenty thousand, twenty".