1321213321111 has 16 divisors (see below), whose sum is σ = 1343284161120. Its totient is φ = 1299328387200.

The previous prime is 1321213321093. The next prime is 1321213321133. The reversal of 1321213321111 is 1111233121231.

It is a cyclic number.

It is not a de Polignac number, because 1321213321111 - 2⁵ = 1321213321079 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 (1321213321811) 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, 28507225 + ... + 28553533.

It is an arithmetic number, because the mean of its divisors is an integer number (83955260070).

Almost surely, 2^{1321213321111} is an apocalyptic number.

1321213321111 is a deficient number, since it is larger than the sum of its proper divisors (22070840009).

1321213321111 is a wasteful number, since it uses less digits than its factorization.

1321213321111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48306.

The product of its digits is 216, while the sum is 22.

Adding to 1321213321111 its reverse (1111233121231), we get a palindrome (2432446442342).

The spelling of 1321213321111 in words is "one trillion, three hundred twenty-one billion, two hundred thirteen million, three hundred twenty-one thousand, one hundred eleven".