1312003222221 has 16 divisors (see below), whose sum is σ = 1762301620800. Its totient is φ = 868210608000.

The previous prime is 1312003222207. The next prime is 1312003222291. The reversal of 1312003222221 is 1222223002131.

It is not a de Polignac number, because 1312003222221 - 2⁶ = 1312003222157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312003222291) 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 15 ways as a sum of consecutive naturals, for example, 2752696 + ... + 3193953.

It is an arithmetic number, because the mean of its divisors is an integer number (110143851300).

Almost surely, 2^{1312003222221} is an apocalyptic number.

It is an amenable number.

1312003222221 is a deficient number, since it is larger than the sum of its proper divisors (450298398579).

1312003222221 is a wasteful number, since it uses less digits than its factorization.

1312003222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5947196.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 1312003222221 its reverse (1222223002131), we get a palindrome (2534226224352).

The spelling of 1312003222221 in words is "one trillion, three hundred twelve billion, three million, two hundred twenty-two thousand, two hundred twenty-one".