1281124005131 has 8 divisors (see below), whose sum is σ = 1302213202128. Its totient is φ = 1260037620000.

The previous prime is 1281124005023. The next prime is 1281124005137. The reversal of 1281124005131 is 1315004211821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1281124005131 - 2¹⁰ = 1281124004107 is a prime.

It is a super-2 number, since 2×1281124005131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1281124005094 and 1281124005103.

It is not an unprimeable number, because it can be changed into a prime (1281124005137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225776 + ... + 1616546.

It is an arithmetic number, because the mean of its divisors is an integer number (162776650266).

Almost surely, 2^{1281124005131} is an apocalyptic number.

1281124005131 is a deficient number, since it is larger than the sum of its proper divisors (21089196997).

1281124005131 is a wasteful number, since it uses less digits than its factorization.

1281124005131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405933.

The product of its (nonzero) digits is 1920, while the sum is 29.

Adding to 1281124005131 its reverse (1315004211821), we get a palindrome (2596128216952).

The spelling of 1281124005131 in words is "one trillion, two hundred eighty-one billion, one hundred twenty-four million, five thousand, one hundred thirty-one".