320121203131 has 2 divisors, whose sum is σ = 320121203132. Its totient is φ = 320121203130.

The previous prime is 320121203123. The next prime is 320121203137. The reversal of 320121203131 is 131302121023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320121203131 - 2³ = 320121203123 is a prime.

It is a super-2 number, since 2×320121203131² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320121203099 and 320121203108.

It is not a weakly prime, because it can be changed into another prime (320121203137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160060601565 + 160060601566.

It is an arithmetic number, because the mean of its divisors is an integer number (160060601566).

Almost surely, 2^320121203131 is an apocalyptic number.

320121203131 is a deficient number, since it is larger than the sum of its proper divisors (1).

320121203131 is an equidigital number, since it uses as much as digits as its factorization.

320121203131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 320121203131 its reverse (131302121023), we get a palindrome (451423324154).

The spelling of 320121203131 in words is "three hundred twenty billion, one hundred twenty-one million, two hundred three thousand, one hundred thirty-one".