1121209975 has 12 divisors (see below), whose sum is σ = 1401251584. Its totient is φ = 889902720.

The previous prime is 1121209967. The next prime is 1121209987. The reversal of 1121209975 is 5799021211.

It is not a de Polignac number, because 1121209975 - 2³ = 1121209967 is a prime.

It is a super-2 number, since 2×1121209975² = 2514223616079001250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

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, 173394 + ... + 179743.

Almost surely, 2^1121209975 is an apocalyptic number.

1121209975 is a deficient number, since it is larger than the sum of its proper divisors (280041609).

1121209975 is a wasteful number, since it uses less digits than its factorization.

1121209975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353274 (or 353269 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 37.

The square root of 1121209975 is about 33484.4736407786. The cubic root of 1121209975 is about 1038.8726612573.

The spelling of 1121209975 in words is "one billion, one hundred twenty-one million, two hundred nine thousand, nine hundred seventy-five".