1321441031 has 4 divisors (see below), whose sum is σ = 1321765200. Its totient is φ = 1321116864.

The previous prime is 1321441019. The next prime is 1321441063. The reversal of 1321441031 is 1301441231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321441031 is a prime.

It is a super-2 number, since 2×1321441031² = 3492412796820685922, 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 = 1321440994 and 1321441012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321441081) 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, 155891 + ... + 164148.

It is an arithmetic number, because the mean of its divisors is an integer number (330441300).

Almost surely, 2^1321441031 is an apocalyptic number.

1321441031 is a deficient number, since it is larger than the sum of its proper divisors (324169).

1321441031 is an equidigital number, since it uses as much as digits as its factorization.

1321441031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324168.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1321441031 is about 36351.6303760918. The cubic root of 1321441031 is about 1097.3603459338.

Adding to 1321441031 its reverse (1301441231), we get a palindrome (2622882262).

It can be divided in two parts, 13214 and 41031, that added together give a palindrome (54245).

The spelling of 1321441031 in words is "one billion, three hundred twenty-one million, four hundred forty-one thousand, thirty-one".