1121320131 has 16 divisors (see below), whose sum is σ = 1587719040. Its totient is φ = 701930880.

The previous prime is 1121320129. The next prime is 1121320139. The reversal of 1121320131 is 1310231211.

It is a happy number.

It is not a de Polignac number, because 1121320131 - 2¹ = 1121320129 is a prime.

It is a super-2 number, since 2×1121320131² = 2514717672371714322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1121320131.

It is not an unprimeable number, because it can be changed into a prime (1121320139) 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 15 ways as a sum of consecutive naturals, for example, 80605 + ... + 93486.

It is an arithmetic number, because the mean of its divisors is an integer number (99232440).

Almost surely, 2^1121320131 is an apocalyptic number.

1121320131 is a deficient number, since it is larger than the sum of its proper divisors (466398909).

1121320131 is a wasteful number, since it uses less digits than its factorization.

1121320131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174226.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1121320131 is about 33486.1184821412. The cubic root of 1121320131 is about 1038.9066823333.

Adding to 1121320131 its reverse (1310231211), we get a palindrome (2431551342).

The spelling of 1121320131 in words is "one billion, one hundred twenty-one million, three hundred twenty thousand, one hundred thirty-one".