320311131243021 has 8 divisors (see below), whose sum is σ = 474535009248960. Its totient is φ = 213540754161996.

The previous prime is 320311131242981. The next prime is 320311131243043. The reversal of 320311131243021 is 120342131113023.

320311131243021 is a `hidden beast` number, since 3 + 2 + 0 + 31 + 11 + 312 + 4 + 302 + 1 = 666.

It is not a de Polignac number, because 320311131243021 - 2¹⁷ = 320311131111949 is a prime.

It is a super-2 number, since 2×320311131243021² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 11863375231223 = 320311131243021 / (3 + 2 + 0 + 3 + 1 + 1 + 1 + 3 + 1 + 2 + 4 + 3 + 0 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320311131243071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5931687615585 + ... + 5931687615638.

It is an arithmetic number, because the mean of its divisors is an integer number (59316876156120).

Almost surely, 2^{320311131243021} is an apocalyptic number.

It is an amenable number.

320311131243021 is a deficient number, since it is larger than the sum of its proper divisors (154223878005939).

320311131243021 is a wasteful number, since it uses less digits than its factorization.

320311131243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11863375231232 (or 11863375231226 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 320311131243021 its reverse (120342131113023), we get a palindrome (440653262356044).

The spelling of 320311131243021 in words is "three hundred twenty trillion, three hundred eleven billion, one hundred thirty-one million, two hundred forty-three thousand, twenty-one".