1321304431211 has 4 divisors (see below), whose sum is σ = 1346234703552. Its totient is φ = 1296374158872.

The previous prime is 1321304431147. The next prime is 1321304431219. The reversal of 1321304431211 is 1121344031231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321304431211 - 2⁶ = 1321304431147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321304431219) 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, 12465136091 + ... + 12465136196.

It is an arithmetic number, because the mean of its divisors is an integer number (336558675888).

Almost surely, 2^{1321304431211} is an apocalyptic number.

1321304431211 is a deficient number, since it is larger than the sum of its proper divisors (24930272341).

1321304431211 is an equidigital number, since it uses as much as digits as its factorization.

1321304431211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24930272340.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 1321304431211 its reverse (1121344031231), we get a palindrome (2442648462442).

The spelling of 1321304431211 in words is "one trillion, three hundred twenty-one billion, three hundred four million, four hundred thirty-one thousand, two hundred eleven".