320000221031 has 2 divisors, whose sum is σ = 320000221032. Its totient is φ = 320000221030.

The previous prime is 320000220979. The next prime is 320000221033. The reversal of 320000221031 is 130122000023.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320000221031 - 2¹⁴ = 320000204647 is a prime.

It is a super-2 number, since 2×320000221031² (a number of 24 digits) contains 22 as substring.

Together with 320000221033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 320000220997 and 320000221015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320000221033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160000110515 + 160000110516.

It is an arithmetic number, because the mean of its divisors is an integer number (160000110516).

Almost surely, 2^320000221031 is an apocalyptic number.

320000221031 is a deficient number, since it is larger than the sum of its proper divisors (1).

320000221031 is an equidigital number, since it uses as much as digits as its factorization.

320000221031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 320000221031 its reverse (130122000023), we get a palindrome (450122221054).

The spelling of 320000221031 in words is "three hundred twenty billion, two hundred twenty-one thousand, thirty-one".