11100551091 has 12 divisors (see below), whose sum is σ = 17217181512. Its totient is φ = 6343171968.

The previous prime is 11100551029. The next prime is 11100551101. The reversal of 11100551091 is 19015500111.

It is not a de Polignac number, because 11100551091 - 2¹⁰ = 11100550067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11100551291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37756830 + ... + 37757123.

It is an arithmetic number, because the mean of its divisors is an integer number (1434765126).

Almost surely, 2^11100551091 is an apocalyptic number.

11100551091 is a deficient number, since it is larger than the sum of its proper divisors (6116630421).

11100551091 is an equidigital number, since it uses as much as digits as its factorization.

11100551091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75513970 (or 75513963 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 24.

The spelling of 11100551091 in words is "eleven billion, one hundred million, five hundred fifty-one thousand, ninety-one".