12111157122 has 32 divisors (see below), whose sum is σ = 24336184320. Its totient is φ = 4018098000.

The previous prime is 12111157109. The next prime is 12111157151. The reversal of 12111157122 is 22175111121.

It is a junction number, because it is equal to n+sod(n) for n = 12111157092 and 12111157101.

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, 3647379 + ... + 3650697.

It is an arithmetic number, because the mean of its divisors is an integer number (760505760).

Almost surely, 2^12111157122 is an apocalyptic number.

12111157122 is an abundant number, since it is smaller than the sum of its proper divisors (12225027198).

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

12111157122 is a wasteful number, since it uses less digits than its factorization.

12111157122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998.

The product of its digits is 280, while the sum is 24.

Adding to 12111157122 its reverse (22175111121), we get a palindrome (34286268243).

The spelling of 12111157122 in words is "twelve billion, one hundred eleven million, one hundred fifty-seven thousand, one hundred twenty-two".