12001222122 has 16 divisors (see below), whose sum is σ = 24031062720. Its totient is φ = 3995637632.

The previous prime is 12001222117. The next prime is 12001222147. The reversal of 12001222122 is 22122210021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186983 + ... + 1197050.

It is an arithmetic number, because the mean of its divisors is an integer number (1501941420).

Almost surely, 2^12001222122 is an apocalyptic number.

12001222122 is an abundant number, since it is smaller than the sum of its proper divisors (12029840598).

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

12001222122 is a wasteful number, since it uses less digits than its factorization.

12001222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384877.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12001222122 its reverse (22122210021), we get a palindrome (34123432143).

The spelling of 12001222122 in words is "twelve billion, one million, two hundred twenty-two thousand, one hundred twenty-two".