1121195281 has 4 divisors (see below), whose sum is σ = 1122713200. Its totient is φ = 1119677364.

The previous prime is 1121195279. The next prime is 1121195297. The reversal of 1121195281 is 1825911211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1825911211 = 109 ⋅16751479.

It is a cyclic number.

It is not a de Polignac number, because 1121195281 - 2¹ = 1121195279 is a prime.

It is a super-2 number, since 2×1121195281² = 2514157716273337922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121195261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757851 + ... + 759328.

It is an arithmetic number, because the mean of its divisors is an integer number (280678300).

Almost surely, 2^1121195281 is an apocalyptic number.

It is an amenable number.

1121195281 is a deficient number, since it is larger than the sum of its proper divisors (1517919).

1121195281 is an equidigital number, since it uses as much as digits as its factorization.

1121195281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517918.

The product of its digits is 1440, while the sum is 31.

The square root of 1121195281 is about 33484.2542249338. The cubic root of 1121195281 is about 1038.8681229276.

The spelling of 1121195281 in words is "one billion, one hundred twenty-one million, one hundred ninety-five thousand, two hundred eighty-one".