1276112723881 has 2 divisors, whose sum is σ = 1276112723882. Its totient is φ = 1276112723880.

The previous prime is 1276112723867. The next prime is 1276112723929. The reversal of 1276112723881 is 1883272116721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1186541811225 + 89570912656 = 1089285^2 + 299284^2 .

It is a cyclic number.

It is not a de Polignac number, because 1276112723881 - 2¹¹ = 1276112721833 is a prime.

It is a super-2 number, since 2×1276112723881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1276112723801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638056361940 + 638056361941.

It is an arithmetic number, because the mean of its divisors is an integer number (638056361941).

Almost surely, 2^{1276112723881} is an apocalyptic number.

It is an amenable number.

1276112723881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276112723881 is an equidigital number, since it uses as much as digits as its factorization.

1276112723881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 49.

The spelling of 1276112723881 in words is "one trillion, two hundred seventy-six billion, one hundred twelve million, seven hundred twenty-three thousand, eight hundred eighty-one".