1121079231 has 16 divisors (see below), whose sum is σ = 1661374720. Its totient is φ = 747153720.

The previous prime is 1121079227. The next prime is 1121079233. The reversal of 1121079231 is 1329701211.

It is not a de Polignac number, because 1121079231 - 2² = 1121079227 is a prime.

It is a super-2 number, since 2×1121079231² = 2513637284359102722, 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 junction number, because it is equal to n+sod(n) for n = 1121079195 and 1121079204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121079233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159726 + ... + 166596.

It is an arithmetic number, because the mean of its divisors is an integer number (103835920).

Almost surely, 2^1121079231 is an apocalyptic number.

1121079231 is a deficient number, since it is larger than the sum of its proper divisors (540295489).

1121079231 is an equidigital number, since it uses as much as digits as its factorization.

1121079231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12923 (or 12917 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 1121079231 is about 33482.5212760330. The cubic root of 1121079231 is about 1038.8322787984.

The spelling of 1121079231 in words is "one billion, one hundred twenty-one million, seventy-nine thousand, two hundred thirty-one".