1123211275 has 6 divisors (see below), whose sum is σ = 1392782012. Its totient is φ = 898569000.

The previous prime is 1123211263. The next prime is 1123211291. The reversal of 1123211275 is 5721123211.

It is not a de Polignac number, because 1123211275 - 2⁷ = 1123211147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 44928451 = 1123211275 / (1 + 1 + 2 + 3 + 2 + 1 + 1 + 2 + 7 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22464201 + ... + 22464250.

Almost surely, 2^1123211275 is an apocalyptic number.

1123211275 is a deficient number, since it is larger than the sum of its proper divisors (269570737).

1123211275 is an equidigital number, since it uses as much as digits as its factorization.

1123211275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44928461 (or 44928456 counting only the distinct ones).

The product of its digits is 840, while the sum is 25.

The square root of 1123211275 is about 33514.3443170234. The cubic root of 1123211275 is about 1039.4904046189.

Adding to 1123211275 its reverse (5721123211), we get a palindrome (6844334486).

The spelling of 1123211275 in words is "one billion, one hundred twenty-three million, two hundred eleven thousand, two hundred seventy-five".