1281232058399 has 4 divisors (see below), whose sum is σ = 1281247115664. Its totient is φ = 1281217001136.

The previous prime is 1281232058371. The next prime is 1281232058411. The reversal of 1281232058399 is 9938502321821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1281232058399 - 2¹² = 1281232054303 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 1281232058399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281232058329) 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, 7400267 + ... + 7571420.

It is an arithmetic number, because the mean of its divisors is an integer number (320311778916).

Almost surely, 2^{1281232058399} is an apocalyptic number.

1281232058399 is a deficient number, since it is larger than the sum of its proper divisors (15057265).

1281232058399 is an equidigital number, since it uses as much as digits as its factorization.

1281232058399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15057264.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 1281232058399 in words is "one trillion, two hundred eighty-one billion, two hundred thirty-two million, fifty-eight thousand, three hundred ninety-nine".