22111791128 has 16 divisors (see below), whose sum is σ = 47382409680. Its totient is φ = 9476481888.

The previous prime is 22111791109. The next prime is 22111791133. The reversal of 22111791128 is 82119711122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197426651 + ... + 197426762.

It is an arithmetic number, because the mean of its divisors is an integer number (2961400605).

Almost surely, 2^22111791128 is an apocalyptic number.

22111791128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22111791128 is an abundant number, since it is smaller than the sum of its proper divisors (25270618552).

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

22111791128 is a wasteful number, since it uses less digits than its factorization.

22111791128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394853426 (or 394853422 counting only the distinct ones).

The product of its digits is 4032, while the sum is 35.

The spelling of 22111791128 in words is "twenty-two billion, one hundred eleven million, seven hundred ninety-one thousand, one hundred twenty-eight".