320312121131 has 12 divisors (see below), whose sum is σ = 327170195352. Its totient is φ = 313594260096.

The previous prime is 320312121127. The next prime is 320312121163. The reversal of 320312121131 is 131121213023.

It is a happy number.

It is not a de Polignac number, because 320312121131 - 2² = 320312121127 is a prime.

It is a super-2 number, since 2×320312121131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320312121121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1189715 + ... + 1433891.

It is an arithmetic number, because the mean of its divisors is an integer number (27264182946).

Almost surely, 2^320312121131 is an apocalyptic number.

320312121131 is a deficient number, since it is larger than the sum of its proper divisors (6858074221).

320312121131 is an equidigital number, since it uses as much as digits as its factorization.

320312121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244750 (or 244697 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 320312121131 its reverse (131121213023), we get a palindrome (451433334154).

The spelling of 320312121131 in words is "three hundred twenty billion, three hundred twelve million, one hundred twenty-one thousand, one hundred thirty-one".