12111972850 has 48 divisors (see below), whose sum is σ = 23069380608. Its totient is φ = 4728976640.

The previous prime is 12111972839. The next prime is 12111972863. The reversal of 12111972850 is 5827911121.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 893322 + ... + 906778.

It is an arithmetic number, because the mean of its divisors is an integer number (480612096).

Almost surely, 2^12111972850 is an apocalyptic number.

12111972850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12111972850 is a deficient number, since it is larger than the sum of its proper divisors (10957407758).

12111972850 is a wasteful number, since it uses less digits than its factorization.

12111972850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13899 (or 13894 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 37.

The spelling of 12111972850 in words is "twelve billion, one hundred eleven million, nine hundred seventy-two thousand, eight hundred fifty".