123210123221281 has 2 divisors, whose sum is σ = 123210123221282. Its totient is φ = 123210123221280.

The previous prime is 123210123221249. The next prime is 123210123221287. The reversal of 123210123221281 is 182122321012321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123037100499681 + 173022721600 = 11092209^2 + 415960^2 .

It is a cyclic number.

It is not a de Polignac number, because 123210123221281 - 2⁵ = 123210123221249 is a prime.

It is a super-2 number, since 2×123210123221281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123210123221287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61605061610640 + 61605061610641.

It is an arithmetic number, because the mean of its divisors is an integer number (61605061610641).

Almost surely, 2^{123210123221281} is an apocalyptic number.

It is an amenable number.

123210123221281 is a deficient number, since it is larger than the sum of its proper divisors (1).

123210123221281 is an equidigital number, since it uses as much as digits as its factorization.

123210123221281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 123210123221281 in words is "one hundred twenty-three trillion, two hundred ten billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred eighty-one".