1281118204841 has 4 divisors (see below), whose sum is σ = 1348545478800. Its totient is φ = 1213690930884.

The previous prime is 1281118204837. The next prime is 1281118204871. The reversal of 1281118204841 is 1484028111821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1281118204841 - 2² = 1281118204837 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281118204871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33713636951 + ... + 33713636988.

It is an arithmetic number, because the mean of its divisors is an integer number (337136369700).

Almost surely, 2^{1281118204841} is an apocalyptic number.

It is an amenable number.

1281118204841 is a deficient number, since it is larger than the sum of its proper divisors (67427273959).

1281118204841 is an equidigital number, since it uses as much as digits as its factorization.

1281118204841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67427273958.

The product of its (nonzero) digits is 32768, while the sum is 41.

The spelling of 1281118204841 in words is "one trillion, two hundred eighty-one billion, one hundred eighteen million, two hundred four thousand, eight hundred forty-one".