22112221000 has 32 divisors (see below), whose sum is σ = 51742599480. Its totient is φ = 8844888000.

The previous prime is 22112220959. The next prime is 22112221007. The reversal of 22112221000 is 12221122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3468503236 + 18643717764 = 58894^2 + 136542^2 .

It is not an unprimeable number, because it can be changed into a prime (22112221007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11055111 + ... + 11057110.

Almost surely, 2^22112221000 is an apocalyptic number.

22112221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22112221000 is an abundant number, since it is smaller than the sum of its proper divisors (29630378480).

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

22112221000 is a wasteful number, since it uses less digits than its factorization.

22112221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22112242 (or 22112228 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22112221000 its reverse (12221122), we get a palindrome (22124442122).

The spelling of 22112221000 in words is "twenty-two billion, one hundred twelve million, two hundred twenty-one thousand".