11199121650 has 36 divisors (see below), whose sum is σ = 30088308042. Its totient is φ = 2986432320.

The previous prime is 11199121649. The next prime is 11199121667. The reversal of 11199121650 is 5612199111.

It can be written as a sum of positive squares in 3 ways, for example, as 7055496009 + 4143625641 = 83997^2 + 64371^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12443019 + ... + 12443918.

Almost surely, 2^11199121650 is an apocalyptic number.

11199121650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11199121650 is an abundant number, since it is smaller than the sum of its proper divisors (18889186392).

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

11199121650 is a wasteful number, since it uses less digits than its factorization.

11199121650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24886955 (or 24886947 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 36.

The spelling of 11199121650 in words is "eleven billion, one hundred ninety-nine million, one hundred twenty-one thousand, six hundred fifty".