1321031201023 has 16 divisors (see below), whose sum is σ = 1350956538880. Its totient is φ = 1291440005856.

The previous prime is 1321031201003. The next prime is 1321031201051. The reversal of 1321031201023 is 3201021301231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321031201023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321031201003) 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, 86464261 + ... + 86479537.

It is an arithmetic number, because the mean of its divisors is an integer number (84434783680).

Almost surely, 2^{1321031201023} is an apocalyptic number.

1321031201023 is a deficient number, since it is larger than the sum of its proper divisors (29925337857).

1321031201023 is a wasteful number, since it uses less digits than its factorization.

1321031201023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26086.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1321031201023 its reverse (3201021301231), we get a palindrome (4522052502254).

The spelling of 1321031201023 in words is "one trillion, three hundred twenty-one billion, thirty-one million, two hundred one thousand, twenty-three".