123402100253 has 2 divisors, whose sum is σ = 123402100254. Its totient is φ = 123402100252.

The previous prime is 123402100219. The next prime is 123402100267. The reversal of 123402100253 is 352001204321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110687959204 + 12714141049 = 332698^2 + 112757^2 .

It is a cyclic number.

It is not a de Polignac number, because 123402100253 - 2¹² = 123402096157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123402100453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61701050126 + 61701050127.

It is an arithmetic number, because the mean of its divisors is an integer number (61701050127).

Almost surely, 2^123402100253 is an apocalyptic number.

It is an amenable number.

123402100253 is a deficient number, since it is larger than the sum of its proper divisors (1).

123402100253 is an equidigital number, since it uses as much as digits as its factorization.

123402100253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 123402100253 its reverse (352001204321), we get a palindrome (475403304574).

The spelling of 123402100253 in words is "one hundred twenty-three billion, four hundred two million, one hundred thousand, two hundred fifty-three".