1321442031 has 16 divisors (see below), whose sum is σ = 2168520704. Its totient is φ = 697024224.

The previous prime is 1321442029. The next prime is 1321442033. The reversal of 1321442031 is 1302441231.

It is an interprime number because it is at equal distance from previous prime (1321442029) and next prime (1321442033).

It is not a de Polignac number, because 1321442031 - 2¹ = 1321442029 is a prime.

It is a super-2 number, since 2×1321442031² = 3492418082586809922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1321441989 and 1321442007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321442033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2419951 + ... + 2420496.

It is an arithmetic number, because the mean of its divisors is an integer number (135532544).

Almost surely, 2^1321442031 is an apocalyptic number.

1321442031 is a deficient number, since it is larger than the sum of its proper divisors (847078673).

1321442031 is a wasteful number, since it uses less digits than its factorization.

1321442031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840470.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1321442031 is about 36351.6441306305. The cubic root of 1321442031 is about 1097.3606227427.

Adding to 1321442031 its reverse (1302441231), we get a palindrome (2623883262).

The spelling of 1321442031 in words is "one billion, three hundred twenty-one million, four hundred forty-two thousand, thirty-one".