12102222042 has 64 divisors (see below), whose sum is σ = 27590492160. Its totient is φ = 3930353712.

The previous prime is 12102222017. The next prime is 12102222061. The reversal of 12102222042 is 24022220121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 555283 + ... + 576665.

It is an arithmetic number, because the mean of its divisors is an integer number (431101440).

Almost surely, 2^12102222042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12102222042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13795246080).

12102222042 is an abundant number, since it is smaller than the sum of its proper divisors (15488270118).

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

12102222042 is a wasteful number, since it uses less digits than its factorization.

12102222042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21664 (or 21658 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12102222042 its reverse (24022220121), we get a palindrome (36124442163).

The spelling of 12102222042 in words is "twelve billion, one hundred two million, two hundred twenty-two thousand, forty-two".