123240012127 has 2 divisors, whose sum is σ = 123240012128. Its totient is φ = 123240012126.

The previous prime is 123240012089. The next prime is 123240012163. The reversal of 123240012127 is 721210042321.

It is a strong prime.

It is an emirp because it is prime and its reverse (721210042321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123240012127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123240015127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61620006063 + 61620006064.

It is an arithmetic number, because the mean of its divisors is an integer number (61620006064).

Almost surely, 2^123240012127 is an apocalyptic number.

123240012127 is a deficient number, since it is larger than the sum of its proper divisors (1).

123240012127 is an equidigital number, since it uses as much as digits as its factorization.

123240012127 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 123240012127 its reverse (721210042321), we get a palindrome (844450054448).

The spelling of 123240012127 in words is "one hundred twenty-three billion, two hundred forty million, twelve thousand, one hundred twenty-seven".