321220213222019 has 2 divisors, whose sum is σ = 321220213222020. Its totient is φ = 321220213222018.

The previous prime is 321220213221983. The next prime is 321220213222021. The reversal of 321220213222019 is 910222312022123.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321220213222019 - 2²⁴ = 321220196444803 is a prime.

It is a super-2 number, since 2×321220213222019² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 321220213222021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (321220213222819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160610106611009 + 160610106611010.

It is an arithmetic number, because the mean of its divisors is an integer number (160610106611010).

Almost surely, 2^{321220213222019} is an apocalyptic number.

321220213222019 is a deficient number, since it is larger than the sum of its proper divisors (1).

321220213222019 is an equidigital number, since it uses as much as digits as its factorization.

321220213222019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 321220213222019 in words is "three hundred twenty-one trillion, two hundred twenty billion, two hundred thirteen million, two hundred twenty-two thousand, nineteen".