13221023012 has 12 divisors (see below), whose sum is σ = 24497778060. Its totient is φ = 6221657856.

The previous prime is 13221022999. The next prime is 13221023033. The reversal of 13221023012 is 21032012231.

It can be written as a sum of positive squares in 2 ways, for example, as 5911456996 + 7309566016 = 76886^2 + 85496^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97213337 + ... + 97213472.

It is an arithmetic number, because the mean of its divisors is an integer number (2041481505).

Almost surely, 2^13221023012 is an apocalyptic number.

It is an amenable number.

13221023012 is a deficient number, since it is larger than the sum of its proper divisors (11276755048).

13221023012 is a wasteful number, since it uses less digits than its factorization.

13221023012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194426830 (or 194426828 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13221023012 its reverse (21032012231), we get a palindrome (34253035243).

The spelling of 13221023012 in words is "thirteen billion, two hundred twenty-one million, twenty-three thousand, twelve".