1121331131 has 4 divisors (see below), whose sum is σ = 1123179072. Its totient is φ = 1119483192.

The previous prime is 1121331119. The next prime is 1121331143. The reversal of 1121331131 is 1311331211.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1121331119) and next prime (1121331143).

It is a cyclic number.

It is not a de Polignac number, because 1121331131 - 2¹⁸ = 1121068987 is a prime.

It is a super-2 number, since 2×1121331131² = 2514767010699478322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121331161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923060 + ... + 924273.

It is an arithmetic number, because the mean of its divisors is an integer number (280794768).

Almost surely, 2^1121331131 is an apocalyptic number.

1121331131 is a deficient number, since it is larger than the sum of its proper divisors (1847941).

1121331131 is an equidigital number, since it uses as much as digits as its factorization.

1121331131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847940.

The product of its digits is 54, while the sum is 17.

The square root of 1121331131 is about 33486.2827289026. The cubic root of 1121331131 is about 1038.9100795006.

Adding to 1121331131 its reverse (1311331211), we get a palindrome (2432662342).

The spelling of 1121331131 in words is "one billion, one hundred twenty-one million, three hundred thirty-one thousand, one hundred thirty-one".