1121158427 has 4 divisors (see below), whose sum is σ = 1122609600. Its totient is φ = 1119707256.

The previous prime is 1121158411. The next prime is 1121158429. The reversal of 1121158427 is 7248511211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7248511211 = 1609 ⋅4504979.

It is a cyclic number.

It is not a de Polignac number, because 1121158427 - 2⁴ = 1121158411 is a prime.

It is a super-2 number, since 2×1121158427² = 2513992436866228658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121158393 and 1121158402.

It is not an unprimeable number, because it can be changed into a prime (1121158429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 724427 + ... + 725972.

It is an arithmetic number, because the mean of its divisors is an integer number (280652400).

Almost surely, 2^1121158427 is an apocalyptic number.

1121158427 is a deficient number, since it is larger than the sum of its proper divisors (1451173).

1121158427 is an equidigital number, since it uses as much as digits as its factorization.

1121158427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451172.

The product of its digits is 4480, while the sum is 32.

The square root of 1121158427 is about 33483.7039020476. The cubic root of 1121158427 is about 1038.8567401751.

Adding to 1121158427 its reverse (7248511211), we get a palindrome (8369669638).

The spelling of 1121158427 in words is "one billion, one hundred twenty-one million, one hundred fifty-eight thousand, four hundred twenty-seven".