1281391243201 has 8 divisors (see below), whose sum is σ = 1365906723200. Its totient is φ = 1198583146800.

The previous prime is 1281391243127. The next prime is 1281391243207. The reversal of 1281391243201 is 1023421931821.

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 1281391243201 - 2¹⁵ = 1281391210433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281391243207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426844350 + ... + 426847351.

It is an arithmetic number, because the mean of its divisors is an integer number (170738340400).

Almost surely, 2^{1281391243201} is an apocalyptic number.

It is an amenable number.

1281391243201 is a deficient number, since it is larger than the sum of its proper divisors (84515479999).

1281391243201 is an equidigital number, since it uses as much as digits as its factorization.

1281391243201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853691799.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 1281391243201 in words is "one trillion, two hundred eighty-one billion, three hundred ninety-one million, two hundred forty-three thousand, two hundred one".