220320012391 has 2 divisors, whose sum is σ = 220320012392. Its totient is φ = 220320012390.

The previous prime is 220320012389. The next prime is 220320012469. The reversal of 220320012391 is 193210023022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220320012391 - 2¹ = 220320012389 is a prime.

Together with 220320012389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220320412391) 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 as a sum of consecutive naturals, namely, 110160006195 + 110160006196.

It is an arithmetic number, because the mean of its divisors is an integer number (110160006196).

Almost surely, 2^220320012391 is an apocalyptic number.

220320012391 is a deficient number, since it is larger than the sum of its proper divisors (1).

220320012391 is an equidigital number, since it uses as much as digits as its factorization.

220320012391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 220320012391 in words is "two hundred twenty billion, three hundred twenty million, twelve thousand, three hundred ninety-one".