321240100243943 has 2 divisors, whose sum is σ = 321240100243944. Its totient is φ = 321240100243942.

The previous prime is 321240100243921. The next prime is 321240100243957. The reversal of 321240100243943 is 349342001042123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321240100243943 - 2³² = 321235805276647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321240100243897 and 321240100243906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321240100213943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160620050121971 + 160620050121972.

It is an arithmetic number, because the mean of its divisors is an integer number (160620050121972).

Almost surely, 2^{321240100243943} is an apocalyptic number.

321240100243943 is a deficient number, since it is larger than the sum of its proper divisors (1).

321240100243943 is an equidigital number, since it uses as much as digits as its factorization.

321240100243943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 321240100243943 in words is "three hundred twenty-one trillion, two hundred forty billion, one hundred million, two hundred forty-three thousand, nine hundred forty-three".