13221211020133 has 4 divisors (see below), whose sum is σ = 13250141460460. Its totient is φ = 13192280579808.

The previous prime is 13221211020041. The next prime is 13221211020137. The reversal of 13221211020133 is 33102011212231.

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 12722297649889 + 498913370244 = 3566833^2 + 706338^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221211020133 - 2²¹ = 13221208922981 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 (13221211020137) 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, 14465219478 + ... + 14465220391.

It is an arithmetic number, because the mean of its divisors is an integer number (3312535365115).

Almost surely, 2^{13221211020133} is an apocalyptic number.

It is an amenable number.

13221211020133 is a deficient number, since it is larger than the sum of its proper divisors (28930440327).

13221211020133 is an equidigital number, since it uses as much as digits as its factorization.

13221211020133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28930440326.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 13221211020133 its reverse (33102011212231), we get a palindrome (46323222232364).

The spelling of 13221211020133 in words is "thirteen trillion, two hundred twenty-one billion, two hundred eleven million, twenty thousand, one hundred thirty-three".