1199991222 has 24 divisors (see below), whose sum is σ = 2613186576. Its totient is φ = 397965456.

The previous prime is 1199991209. The next prime is 1199991229. The reversal of 1199991222 is 2221999911.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199991229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165658 + ... + 172749.

It is an arithmetic number, because the mean of its divisors is an integer number (108882774).

Almost surely, 2^1199991222 is an apocalyptic number.

1199991222 is an abundant number, since it is smaller than the sum of its proper divisors (1413195354).

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

1199991222 is a wasteful number, since it uses less digits than its factorization.

1199991222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338612 (or 338609 counting only the distinct ones).

The product of its digits is 52488, while the sum is 45.

The square root of 1199991222 is about 34640.8894516293. The cubic root of 1199991222 is about 1062.6559780605.

The spelling of 1199991222 in words is "one billion, one hundred ninety-nine million, nine hundred ninety-one thousand, two hundred twenty-two".