11121619850 has 24 divisors (see below), whose sum is σ = 22566778848. Its totient is φ = 4044225200.

The previous prime is 11121619837. The next prime is 11121619867. The reversal of 11121619850 is 5891612111.

It is a self number, because there is not a number n which added to its sum of digits gives 11121619850.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10110014 + ... + 10111113.

It is an arithmetic number, because the mean of its divisors is an integer number (940282452).

Almost surely, 2^11121619850 is an apocalyptic number.

11121619850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11121619850 is an abundant number, since it is smaller than the sum of its proper divisors (11445158998).

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

11121619850 is a wasteful number, since it uses less digits than its factorization.

11121619850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20221150 (or 20221145 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 35.

The spelling of 11121619850 in words is "eleven billion, one hundred twenty-one million, six hundred nineteen thousand, eight hundred fifty".