1321023313201 has 4 divisors (see below), whose sum is σ = 1321224910372. Its totient is φ = 1320821716032.

The previous prime is 1321023313151. The next prime is 1321023313217. The reversal of 1321023313201 is 1023133201231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 906256400625 + 414766912576 = 951975^2 + 644024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321023313201 - 2⁹ = 1321023312689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321023353201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100788756 + ... + 100801861.

It is an arithmetic number, because the mean of its divisors is an integer number (330306227593).

Almost surely, 2^{1321023313201} is an apocalyptic number.

It is an amenable number.

1321023313201 is a deficient number, since it is larger than the sum of its proper divisors (201597171).

1321023313201 is an equidigital number, since it uses as much as digits as its factorization.

1321023313201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201597170.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1321023313201 its reverse (1023133201231), we get a palindrome (2344156514432).

The spelling of 1321023313201 in words is "one trillion, three hundred twenty-one billion, twenty-three million, three hundred thirteen thousand, two hundred one".