1121216175 has 30 divisors (see below), whose sum is σ = 2076883688. Its totient is φ = 597980880.

The previous prime is 1121216149. The next prime is 1121216179. The reversal of 1121216175 is 5716121211.

1121216175 is a `hidden beast` number, since 1 + 1 + 21 + 21 + 617 + 5 = 666.

It is not a de Polignac number, because 1121216175 - 2²⁰ = 1120167599 is a prime.

It is a super-2 number, since 2×1121216175² = 2514251422163261250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121216179) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 274819 + ... + 278868.

Almost surely, 2^1121216175 is an apocalyptic number.

1121216175 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1121216175 is a deficient number, since it is larger than the sum of its proper divisors (955667513).

1121216175 is an equidigital number, since it uses as much as digits as its factorization.

1121216175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553709 (or 553695 counting only the distinct ones).

The product of its digits is 840, while the sum is 27.

The square root of 1121216175 is about 33484.5662208726. The cubic root of 1121216175 is about 1038.8745761524.

Adding to 1121216175 its reverse (5716121211), we get a palindrome (6837337386).

The spelling of 1121216175 in words is "one billion, one hundred twenty-one million, two hundred sixteen thousand, one hundred seventy-five".