1312201221303 has 32 divisors (see below), whose sum is σ = 2001653988352. Its totient is φ = 749038752000.

The previous prime is 1312201221271. The next prime is 1312201221311. The reversal of 1312201221303 is 3031221022131.

It is not a de Polignac number, because 1312201221303 - 2⁵ = 1312201221271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 1312201221303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312201221313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87396825 + ... + 87411837.

It is an arithmetic number, because the mean of its divisors is an integer number (62551687136).

Almost surely, 2^{1312201221303} is an apocalyptic number.

1312201221303 is a deficient number, since it is larger than the sum of its proper divisors (689452767049).

1312201221303 is a wasteful number, since it uses less digits than its factorization.

1312201221303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19135.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1312201221303 its reverse (3031221022131), we get a palindrome (4343422243434).

The spelling of 1312201221303 in words is "one trillion, three hundred twelve billion, two hundred one million, two hundred twenty-one thousand, three hundred three".