22112112111220 has 12 divisors (see below), whose sum is σ = 46435435433604. Its totient is φ = 8844844844480.

The previous prime is 22112112111209. The next prime is 22112112111223. The reversal of 22112112111220 is 2211121121122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16436634940944 + 5675477170276 = 4054212^2 + 2382326^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22112112111223) 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, 552802802761 + ... + 552802802800.

It is an arithmetic number, because the mean of its divisors is an integer number (3869619619467).

Almost surely, 2^{22112112111220} is an apocalyptic number.

22112112111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22112112111220 is an abundant number, since it is smaller than the sum of its proper divisors (24323323322384).

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

22112112111220 is a wasteful number, since it uses less digits than its factorization.

22112112111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105605605570 (or 1105605605568 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22112112111220 its reverse (2211121121122), we get a palindrome (24323233232342).

The spelling of 22112112111220 in words is "twenty-two trillion, one hundred twelve billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty".