123210011321 has 2 divisors, whose sum is σ = 123210011322. Its totient is φ = 123210011320.

The previous prime is 123210011297. The next prime is 123210011329. The reversal of 123210011321 is 123110012321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114267661225 + 8942350096 = 338035^2 + 94564^2 .

It is a cyclic number.

It is not a de Polignac number, because 123210011321 - 2²⁶ = 123142902457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123210011321.

It is not a weakly prime, because it can be changed into another prime (123210011329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61605005660 + 61605005661.

It is an arithmetic number, because the mean of its divisors is an integer number (61605005661).

Almost surely, 2^123210011321 is an apocalyptic number.

It is an amenable number.

123210011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

123210011321 is an equidigital number, since it uses as much as digits as its factorization.

123210011321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 123210011321 its reverse (123110012321), we get a palindrome (246320023642).

It can be divided in two parts, 1232100 and 11321, that added together give a palindrome (1243421).

The spelling of 123210011321 in words is "one hundred twenty-three billion, two hundred ten million, eleven thousand, three hundred twenty-one".