1121100191 has 8 divisors (see below), whose sum is σ = 1130030160. Its totient is φ = 1112182848.

The previous prime is 1121100133. The next prime is 1121100193. The reversal of 1121100191 is 1910011211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121100191 - 2²⁶ = 1053991327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121100193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258755 + ... + 263051.

It is an arithmetic number, because the mean of its divisors is an integer number (141253770).

Almost surely, 2^1121100191 is an apocalyptic number.

1121100191 is a deficient number, since it is larger than the sum of its proper divisors (8929969).

1121100191 is a wasteful number, since it uses less digits than its factorization.

1121100191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6313.

The product of its (nonzero) digits is 18, while the sum is 17.

The square root of 1121100191 is about 33482.8342736991. The cubic root of 1121100191 is about 1038.8387528543.

The spelling of 1121100191 in words is "one billion, one hundred twenty-one million, one hundred thousand, one hundred ninety-one".