22112212221220 has 48 divisors (see below), whose sum is σ = 50807385877248. Its totient is φ = 8016944463360.

The previous prime is 22112212221163. The next prime is 22112212221241. The reversal of 22112212221220 is 2212221221122.

It is a super-2 number, since 2×22112212221220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 22112212221191 and 22112212221200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149050572 + ... + 149198851.

It is an arithmetic number, because the mean of its divisors is an integer number (1058487205776).

Almost surely, 2^{22112212221220} is an apocalyptic number.

22112212221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22112212221220 is an abundant number, since it is smaller than the sum of its proper divisors (28695173656028).

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

22112212221220 is a wasteful number, since it uses less digits than its factorization.

22112212221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298249780 (or 298249778 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22112212221220 its reverse (2212221221122), we get a palindrome (24324433442342).

The spelling of 22112212221220 in words is "twenty-two trillion, one hundred twelve billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty".