1321254243135 has 12 divisors (see below), whose sum is σ = 2290174021512. Its totient is φ = 704668929648.

The previous prime is 1321254243107. The next prime is 1321254243139. The reversal of 1321254243135 is 5313424521231.

1321254243135 is a `hidden beast` number, since 1 + 3 + 212 + 5 + 4 + 2 + 431 + 3 + 5 = 666.

It is not a de Polignac number, because 1321254243135 - 2⁵ = 1321254243103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1321254243135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321254243139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14680602657 + ... + 14680602746.

It is an arithmetic number, because the mean of its divisors is an integer number (190847835126).

Almost surely, 2^{1321254243135} is an apocalyptic number.

1321254243135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1321254243135 is a deficient number, since it is larger than the sum of its proper divisors (968919778377).

1321254243135 is a wasteful number, since it uses less digits than its factorization.

1321254243135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29361205414 (or 29361205411 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

Adding to 1321254243135 its reverse (5313424521231), we get a palindrome (6634678764366).

The spelling of 1321254243135 in words is "one trillion, three hundred twenty-one billion, two hundred fifty-four million, two hundred forty-three thousand, one hundred thirty-five".