12222155242 has 32 divisors (see below), whose sum is σ = 20878197120. Its totient is φ = 5311753920.

The previous prime is 12222155237. The next prime is 12222155269. The reversal of 12222155242 is 24255122221.

It is a self number, because there is not a number n which added to its sum of digits gives 12222155242.

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, 1946484 + ... + 1952752.

It is an arithmetic number, because the mean of its divisors is an integer number (652443660).

Almost surely, 2^12222155242 is an apocalyptic number.

12222155242 is a deficient number, since it is larger than the sum of its proper divisors (8656041878).

12222155242 is a wasteful number, since it uses less digits than its factorization.

12222155242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10158.

The product of its digits is 6400, while the sum is 28.

Adding to 12222155242 its reverse (24255122221), we get a palindrome (36477277463).

The spelling of 12222155242 in words is "twelve billion, two hundred twenty-two million, one hundred fifty-five thousand, two hundred forty-two".