321665463511123 has 2 divisors, whose sum is σ = 321665463511124. Its totient is φ = 321665463511122.

The previous prime is 321665463511121. The next prime is 321665463511213. The reversal of 321665463511123 is 321115364566123.

Together with next prime (321665463511213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321665463511123 - 2¹ = 321665463511121 is a prime.

It is a super-2 number, since 2×321665463511123² (a number of 30 digits) contains 22 as substring.

Together with 321665463511121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (321665463511121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160832731755561 + 160832731755562.

It is an arithmetic number, because the mean of its divisors is an integer number (160832731755562).

Almost surely, 2^{321665463511123} is an apocalyptic number.

321665463511123 is a deficient number, since it is larger than the sum of its proper divisors (1).

321665463511123 is an equidigital number, since it uses as much as digits as its factorization.

321665463511123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 49.

The spelling of 321665463511123 in words is "three hundred twenty-one trillion, six hundred sixty-five billion, four hundred sixty-three million, five hundred eleven thousand, one hundred twenty-three".