123402122321 has 2 divisors, whose sum is σ = 123402122322. Its totient is φ = 123402122320.

The previous prime is 123402122213. The next prime is 123402122359. The reversal of 123402122321 is 123221204321.

Together with previous prime (123402122213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114860665921 + 8541456400 = 338911^2 + 92420^2 .

It is a cyclic number.

It is not a de Polignac number, because 123402122321 - 2²⁶ = 123335013457 is a prime.

It is not a weakly prime, because it can be changed into another prime (123402122381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61701061160 + 61701061161.

It is an arithmetic number, because the mean of its divisors is an integer number (61701061161).

Almost surely, 2^123402122321 is an apocalyptic number.

It is an amenable number.

123402122321 is a deficient number, since it is larger than the sum of its proper divisors (1).

123402122321 is an equidigital number, since it uses as much as digits as its factorization.

123402122321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 123402122321 its reverse (123221204321), we get a palindrome (246623326642).

The spelling of 123402122321 in words is "one hundred twenty-three billion, four hundred two million, one hundred twenty-two thousand, three hundred twenty-one".