1281431173311 has 48 divisors (see below), whose sum is σ = 1897689381120. Its totient is φ = 832971686400.

The previous prime is 1281431173249. The next prime is 1281431173313. The reversal of 1281431173311 is 1133711341821.

1281431173311 is a `hidden beast` number, since 1 + 2 + 8 + 1 + 4 + 311 + 7 + 331 + 1 = 666.

It is not a de Polignac number, because 1281431173311 - 2¹⁴ = 1281431156927 is a prime.

It is a super-2 number, since 2×1281431173311² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281431173313) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53949940 + ... + 53973686.

It is an arithmetic number, because the mean of its divisors is an integer number (39535195440).

Almost surely, 2^{1281431173311} is an apocalyptic number.

1281431173311 is a deficient number, since it is larger than the sum of its proper divisors (616258207809).

1281431173311 is a wasteful number, since it uses less digits than its factorization.

1281431173311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24636 (or 24633 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The spelling of 1281431173311 in words is "one trillion, two hundred eighty-one billion, four hundred thirty-one million, one hundred seventy-three thousand, three hundred eleven".