1431311121 has 8 divisors (see below), whose sum is σ = 2120460960. Its totient is φ = 954207396.

The previous prime is 1431311117. The next prime is 1431311129. The reversal of 1431311121 is 1211131341.

It is a happy number.

It is not a de Polignac number, because 1431311121 - 2² = 1431311117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1431311094 and 1431311103.

It is not an unprimeable number, because it can be changed into a prime (1431311129) 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 7 ways as a sum of consecutive naturals, for example, 26505735 + ... + 26505788.

It is an arithmetic number, because the mean of its divisors is an integer number (265057620).

Almost surely, 2^1431311121 is an apocalyptic number.

It is an amenable number.

1431311121 is a deficient number, since it is larger than the sum of its proper divisors (689149839).

1431311121 is an equidigital number, since it uses as much as digits as its factorization.

1431311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53011532 (or 53011526 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1431311121 is about 37832.6726653035. The cubic root of 1431311121 is about 1126.9673876706.

Adding to 1431311121 its reverse (1211131341), we get a palindrome (2642442462).

The spelling of 1431311121 in words is "one billion, four hundred thirty-one million, three hundred eleven thousand, one hundred twenty-one".