123203031257 has 2 divisors, whose sum is σ = 123203031258. Its totient is φ = 123203031256.

The previous prime is 123203031163. The next prime is 123203031283. The reversal of 123203031257 is 752130302321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100600614976 + 22602416281 = 317176^2 + 150341^2 .

It is a cyclic number.

It is not a de Polignac number, because 123203031257 - 2³² = 118908063961 is a prime.

It is not a weakly prime, because it can be changed into another prime (123203031157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61601515628 + 61601515629.

It is an arithmetic number, because the mean of its divisors is an integer number (61601515629).

Almost surely, 2^123203031257 is an apocalyptic number.

It is an amenable number.

123203031257 is a deficient number, since it is larger than the sum of its proper divisors (1).

123203031257 is an equidigital number, since it uses as much as digits as its factorization.

123203031257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 29.

Adding to 123203031257 its reverse (752130302321), we get a palindrome (875333333578).

The spelling of 123203031257 in words is "one hundred twenty-three billion, two hundred three million, thirty-one thousand, two hundred fifty-seven".