123243502221431 has 2 divisors, whose sum is σ = 123243502221432. Its totient is φ = 123243502221430.

The previous prime is 123243502221409. The next prime is 123243502221451. The reversal of 123243502221431 is 134122205342321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123243502221431 - 2³⁰ = 123242428479607 is a prime.

It is a super-2 number, since 2×123243502221431² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123243502221391 and 123243502221400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123243502221451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621751110715 + 61621751110716.

It is an arithmetic number, because the mean of its divisors is an integer number (61621751110716).

Almost surely, 2^{123243502221431} is an apocalyptic number.

123243502221431 is a deficient number, since it is larger than the sum of its proper divisors (1).

123243502221431 is an equidigital number, since it uses as much as digits as its factorization.

123243502221431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 123243502221431 its reverse (134122205342321), we get a palindrome (257365707563752).

The spelling of 123243502221431 in words is "one hundred twenty-three trillion, two hundred forty-three billion, five hundred two million, two hundred twenty-one thousand, four hundred thirty-one".