22222220212220 has 48 divisors (see below), whose sum is σ = 53347670530560. Its totient is φ = 7616998069824.

The previous prime is 22222220212147. The next prime is 22222220212279. The reversal of 22222220212220 is 2221202222222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20819774 + ... + 21861093.

It is an arithmetic number, because the mean of its divisors is an integer number (1111409802720).

Almost surely, 2^{22222220212220} is an apocalyptic number.

22222220212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222220212220 is an abundant number, since it is smaller than the sum of its proper divisors (31125450318340).

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

22222220212220 is a wasteful number, since it uses less digits than its factorization.

22222220212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42684602 (or 42684600 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 22222220212220 its reverse (2221202222222), we get a palindrome (24443422434442).

The spelling of 22222220212220 in words is "twenty-two trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty".