123402122513 has 2 divisors, whose sum is σ = 123402122514. Its totient is φ = 123402122512.

The previous prime is 123402122509. The next prime is 123402122573. The reversal of 123402122513 is 315221204321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120223079824 + 3179042689 = 346732^2 + 56383^2 .

It is an emirp because it is prime and its reverse (315221204321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123402122513 - 2² = 123402122509 is a prime.

It is a super-2 number, since 2×123402122513² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123402122573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61701061256 + 61701061257.

It is an arithmetic number, because the mean of its divisors is an integer number (61701061257).

Almost surely, 2^123402122513 is an apocalyptic number.

It is an amenable number.

123402122513 is a deficient number, since it is larger than the sum of its proper divisors (1).

123402122513 is an equidigital number, since it uses as much as digits as its factorization.

123402122513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 123402122513 its reverse (315221204321), we get a palindrome (438623326834).

The spelling of 123402122513 in words is "one hundred twenty-three billion, four hundred two million, one hundred twenty-two thousand, five hundred thirteen".