13221031011 has 16 divisors (see below), whose sum is σ = 18063790080. Its totient is φ = 8596284480.

The previous prime is 13221030973. The next prime is 13221031027. The reversal of 13221031011 is 11013012231.

It is a happy number.

It is not a de Polignac number, because 13221031011 - 2⁶ = 13221030947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13221031081) 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, 410430 + ... + 441468.

It is an arithmetic number, because the mean of its divisors is an integer number (1128986880).

Almost surely, 2^13221031011 is an apocalyptic number.

13221031011 is a deficient number, since it is larger than the sum of its proper divisors (4842759069).

13221031011 is a wasteful number, since it uses less digits than its factorization.

13221031011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34546.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13221031011 its reverse (11013012231), we get a palindrome (24234043242).

The spelling of 13221031011 in words is "thirteen billion, two hundred twenty-one million, thirty-one thousand, eleven".