321204021040247 has 2 divisors, whose sum is σ = 321204021040248. Its totient is φ = 321204021040246.

The previous prime is 321204021040219. The next prime is 321204021040249. The reversal of 321204021040247 is 742040120402123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321204021040247 - 2²⁰ = 321204019991671 is a prime.

Together with 321204021040249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321204021040249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160602010520123 + 160602010520124.

It is an arithmetic number, because the mean of its divisors is an integer number (160602010520124).

Almost surely, 2^{321204021040247} is an apocalyptic number.

321204021040247 is a deficient number, since it is larger than the sum of its proper divisors (1).

321204021040247 is an equidigital number, since it uses as much as digits as its factorization.

321204021040247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 32.

The spelling of 321204021040247 in words is "three hundred twenty-one trillion, two hundred four billion, twenty-one million, forty thousand, two hundred forty-seven".