1281118846281 has 32 divisors (see below), whose sum is σ = 1800920985600. Its totient is φ = 807842056320.

The previous prime is 1281118846237. The next prime is 1281118846291. The reversal of 1281118846281 is 1826488111821.

It is not a de Polignac number, because 1281118846281 - 2³⁷ = 1143679892809 is a prime.

It is a super-2 number, since 2×1281118846281² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1281118846201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99761421 + ... + 99774261.

It is an arithmetic number, because the mean of its divisors is an integer number (56278780800).

Almost surely, 2^{1281118846281} is an apocalyptic number.

It is an amenable number.

1281118846281 is a deficient number, since it is larger than the sum of its proper divisors (519802139319).

1281118846281 is a wasteful number, since it uses less digits than its factorization.

1281118846281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15509.

The product of its digits is 393216, while the sum is 51.

The spelling of 1281118846281 in words is "one trillion, two hundred eighty-one billion, one hundred eighteen million, eight hundred forty-six thousand, two hundred eighty-one".