123131403247 has 2 divisors, whose sum is σ = 123131403248. Its totient is φ = 123131403246.

The previous prime is 123131403191. The next prime is 123131403299. The reversal of 123131403247 is 742304131321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123131403247 - 2⁷ = 123131403119 is a prime.

It is a super-2 number, since 2×123131403247² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123131403547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61565701623 + 61565701624.

It is an arithmetic number, because the mean of its divisors is an integer number (61565701624).

Almost surely, 2^123131403247 is an apocalyptic number.

123131403247 is a deficient number, since it is larger than the sum of its proper divisors (1).

123131403247 is an equidigital number, since it uses as much as digits as its factorization.

123131403247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 123131403247 its reverse (742304131321), we get a palindrome (865435534568).

The spelling of 123131403247 in words is "one hundred twenty-three billion, one hundred thirty-one million, four hundred three thousand, two hundred forty-seven".