123203031157 has 2 divisors, whose sum is σ = 123203031158. Its totient is φ = 123203031156.

The previous prime is 123203031151. The next prime is 123203031163. The reversal of 123203031157 is 751130302321.

It is a balanced prime because it is at equal distance from previous prime (123203031151) and next prime (123203031163).

It can be written as a sum of positive squares in only one way, i.e., 119725688196 + 3477342961 = 346014^2 + 58969^2 .

It is a cyclic number.

It is not a de Polignac number, because 123203031157 - 2²⁷ = 123068813429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123203031151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61601515578 + 61601515579.

It is an arithmetic number, because the mean of its divisors is an integer number (61601515579).

Almost surely, 2^123203031157 is an apocalyptic number.

It is an amenable number.

123203031157 is a deficient number, since it is larger than the sum of its proper divisors (1).

123203031157 is an equidigital number, since it uses as much as digits as its factorization.

123203031157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

Adding to 123203031157 its reverse (751130302321), we get a palindrome (874333333478).

The spelling of 123203031157 in words is "one hundred twenty-three billion, two hundred three million, thirty-one thousand, one hundred fifty-seven".