1321144131 has 4 divisors (see below), whose sum is σ = 1761525512. Its totient is φ = 880762752.

The previous prime is 1321144129. The next prime is 1321144147. The reversal of 1321144131 is 1314411231.

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

It is not a de Polignac number, because 1321144131 - 2¹ = 1321144129 is a prime.

It is a super-2 number, since 2×1321144131² = 3490843629751490322, 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 = 1321144098 and 1321144107.

It is not an unprimeable number, because it can be changed into a prime (1321144831) 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, 220190686 + ... + 220190691.

It is an arithmetic number, because the mean of its divisors is an integer number (440381378).

Almost surely, 2^1321144131 is an apocalyptic number.

1321144131 is a deficient number, since it is larger than the sum of its proper divisors (440381381).

1321144131 is an equidigital number, since it uses as much as digits as its factorization.

1321144131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440381380.

The product of its digits is 288, while the sum is 21.

The square root of 1321144131 is about 36347.5464233832. The cubic root of 1321144131 is about 1097.2781551833.

Adding to 1321144131 its reverse (1314411231), we get a palindrome (2635555362).

The spelling of 1321144131 in words is "one billion, three hundred twenty-one million, one hundred forty-four thousand, one hundred thirty-one".