123811271 has 2 divisors, whose sum is σ = 123811272. Its totient is φ = 123811270.

The previous prime is 123811229. The next prime is 123811279. The reversal of 123811271 is 172118321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123811271 - 2¹⁴ = 123794887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123811271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123811279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61905635 + 61905636.

It is an arithmetic number, because the mean of its divisors is an integer number (61905636).

Almost surely, 2^123811271 is an apocalyptic number.

123811271 is a deficient number, since it is larger than the sum of its proper divisors (1).

123811271 is an equidigital number, since it uses as much as digits as its factorization.

123811271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 26.

The square root of 123811271 is about 11127.0513164989. The cubic root of 123811271 is about 498.4099770136.

Adding to 123811271 its reverse (172118321), we get a palindrome (295929592).

The spelling of 123811271 in words is "one hundred twenty-three million, eight hundred eleven thousand, two hundred seventy-one".