220120320131 has 2 divisors, whose sum is σ = 220120320132. Its totient is φ = 220120320130.

The previous prime is 220120320113. The next prime is 220120320181. The reversal of 220120320131 is 131023021022.

Together with previous prime (220120320113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220120320131 is a prime.

It is a super-2 number, since 2×220120320131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220120320181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060160065 + 110060160066.

It is an arithmetic number, because the mean of its divisors is an integer number (110060160066).

Almost surely, 2^220120320131 is an apocalyptic number.

220120320131 is a deficient number, since it is larger than the sum of its proper divisors (1).

220120320131 is an equidigital number, since it uses as much as digits as its factorization.

220120320131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 220120320131 its reverse (131023021022), we get a palindrome (351143341153).

The spelling of 220120320131 in words is "two hundred twenty billion, one hundred twenty million, three hundred twenty thousand, one hundred thirty-one".