321240100243189 has 2 divisors, whose sum is σ = 321240100243190. Its totient is φ = 321240100243188.

The previous prime is 321240100243157. The next prime is 321240100243261. The reversal of 321240100243189 is 981342001042123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205655389676100 + 115584710567089 = 14340690^2 + 10751033^2 .

It is a cyclic number.

It is not a de Polignac number, because 321240100243189 - 2⁵ = 321240100243157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321240100243109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160620050121594 + 160620050121595.

It is an arithmetic number, because the mean of its divisors is an integer number (160620050121595).

Almost surely, 2^{321240100243189} is an apocalyptic number.

It is an amenable number.

321240100243189 is a deficient number, since it is larger than the sum of its proper divisors (1).

321240100243189 is an equidigital number, since it uses as much as digits as its factorization.

321240100243189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 321240100243189 in words is "three hundred twenty-one trillion, two hundred forty billion, one hundred million, two hundred forty-three thousand, one hundred eighty-nine".