1281200512027 has 8 divisors (see below), whose sum is σ = 1294914905856. Its totient is φ = 1267518350952.

The previous prime is 1281200512021. The next prime is 1281200512049. The reversal of 1281200512027 is 7202150021821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1281200512027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1281200512027.

It is not an unprimeable number, because it can be changed into a prime (1281200512021) 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 7 ways as a sum of consecutive naturals, for example, 7978263 + ... + 8137264.

It is an arithmetic number, because the mean of its divisors is an integer number (161864363232).

Almost surely, 2^{1281200512027} is an apocalyptic number.

1281200512027 is a deficient number, since it is larger than the sum of its proper divisors (13714393829).

1281200512027 is a wasteful number, since it uses less digits than its factorization.

1281200512027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16116377.

The product of its (nonzero) digits is 4480, while the sum is 31.

Adding to 1281200512027 its reverse (7202150021821), we get a palindrome (8483350533848).

The spelling of 1281200512027 in words is "one trillion, two hundred eighty-one billion, two hundred million, five hundred twelve thousand, twenty-seven".