1321344021201 has 16 divisors (see below), whose sum is σ = 1815583527744. Its totient is φ = 854162777664.

The previous prime is 1321344021197. The next prime is 1321344021209. The reversal of 1321344021201 is 1021204431231.

It is not a de Polignac number, because 1321344021201 - 2² = 1321344021197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321344021209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20281471 + ... + 20346516.

It is an arithmetic number, because the mean of its divisors is an integer number (113473970484).

Almost surely, 2^{1321344021201} is an apocalyptic number.

It is an amenable number.

1321344021201 is a deficient number, since it is larger than the sum of its proper divisors (494239506543).

1321344021201 is a wasteful number, since it uses less digits than its factorization.

1321344021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40628320.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1321344021201 its reverse (1021204431231), we get a palindrome (2342548452432).

The spelling of 1321344021201 in words is "one trillion, three hundred twenty-one billion, three hundred forty-four million, twenty-one thousand, two hundred one".