1320321310231 has 16 divisors (see below), whose sum is σ = 1649639796480. Its totient is φ = 1026618727680.

The previous prime is 1320321310229. The next prime is 1320321310249. The reversal of 1320321310231 is 1320131230231.

It is not a de Polignac number, because 1320321310231 - 2¹ = 1320321310229 is a prime.

It is a super-2 number, since 2×1320321310231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320321310261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18322746 + ... + 18394663.

It is an arithmetic number, because the mean of its divisors is an integer number (103102487280).

Almost surely, 2^{1320321310231} is an apocalyptic number.

1320321310231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1320321310231 is a deficient number, since it is larger than the sum of its proper divisors (329318486249).

1320321310231 is a wasteful number, since it uses less digits than its factorization.

1320321310231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36717894.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1320321310231 its reverse (1320131230231), we get a palindrome (2640452540462).

The spelling of 1320321310231 in words is "one trillion, three hundred twenty billion, three hundred twenty-one million, three hundred ten thousand, two hundred thirty-one".