123203780251 has 2 divisors, whose sum is σ = 123203780252. Its totient is φ = 123203780250.

The previous prime is 123203780171. The next prime is 123203780257. The reversal of 123203780251 is 152087302321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123203780251 - 2²⁷ = 123069562523 is a prime.

It is not a weakly prime, because it can be changed into another prime (123203780257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61601890125 + 61601890126.

It is an arithmetic number, because the mean of its divisors is an integer number (61601890126).

Almost surely, 2^123203780251 is an apocalyptic number.

123203780251 is a deficient number, since it is larger than the sum of its proper divisors (1).

123203780251 is an equidigital number, since it uses as much as digits as its factorization.

123203780251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 123203780251 in words is "one hundred twenty-three billion, two hundred three million, seven hundred eighty thousand, two hundred fifty-one".