320121103131 has 96 divisors (see below), whose sum is σ = 496880697600. Its totient is φ = 203630112000.

The previous prime is 320121103123. The next prime is 320121103139. The reversal of 320121103131 is 131301121023.

320121103131 is a `hidden beast` number, since 320 + 1 + 21 + 10 + 313 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (320121103123) and next prime (320121103139).

It is not a de Polignac number, because 320121103131 - 2³ = 320121103123 is a prime.

It is a super-2 number, since 2×320121103131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320121103139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 739309491 + ... + 739309923.

It is an arithmetic number, because the mean of its divisors is an integer number (5175840600).

Almost surely, 2^320121103131 is an apocalyptic number.

320121103131 is a deficient number, since it is larger than the sum of its proper divisors (176759594469).

320121103131 is a wasteful number, since it uses less digits than its factorization.

320121103131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 320121103131 its reverse (131301121023), we get a palindrome (451422224154).

The spelling of 320121103131 in words is "three hundred twenty billion, one hundred twenty-one million, one hundred three thousand, one hundred thirty-one".