13221012011 has 4 divisors (see below), whose sum is σ = 13275871224. Its totient is φ = 13166152800.

The previous prime is 13221012001. The next prime is 13221012023. The reversal of 13221012011 is 11021012231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11021012231 = 53 ⋅207943627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13221012011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221012001) 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, 27429245 + ... + 27429726.

It is an arithmetic number, because the mean of its divisors is an integer number (3318967806).

Almost surely, 2^13221012011 is an apocalyptic number.

13221012011 is a deficient number, since it is larger than the sum of its proper divisors (54859213).

13221012011 is an equidigital number, since it uses as much as digits as its factorization.

13221012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54859212.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 13221012011 its reverse (11021012231), we get a palindrome (24242024242).

The spelling of 13221012011 in words is "thirteen billion, two hundred twenty-one million, twelve thousand, eleven".