1321031221023 has 8 divisors (see below), whose sum is σ = 1761380281008. Its totient is φ = 880684820864.

The previous prime is 1321031221007. The next prime is 1321031221051. The reversal of 1321031221023 is 3201221301231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321031221023 - 2⁴ = 1321031221007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321031221073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1513015 + ... + 2220647.

It is an arithmetic number, because the mean of its divisors is an integer number (220172535126).

Almost surely, 2^{1321031221023} is an apocalyptic number.

1321031221023 is a deficient number, since it is larger than the sum of its proper divisors (440349059985).

1321031221023 is an equidigital number, since it uses as much as digits as its factorization.

1321031221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329913.

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

Adding to 1321031221023 its reverse (3201221301231), we get a palindrome (4522252522254).

The spelling of 1321031221023 in words is "one trillion, three hundred twenty-one billion, thirty-one million, two hundred twenty-one thousand, twenty-three".