13220311212232 has 16 divisors (see below), whose sum is σ = 24788124981900. Its totient is φ = 6610144550400.

The previous prime is 13220311212211. The next prime is 13220311212239. The reversal of 13220311212232 is 23221211302231.

It can be written as a sum of positive squares in 2 ways, for example, as 13219288875556 + 1022336676 = 3635834^2 + 31974^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13220311212197 and 13220311212206.

It is not an unprimeable number, because it can be changed into a prime (13220311212239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6053232 + ... + 7942432.

Almost surely, 2^{13220311212232} is an apocalyptic number.

It is an amenable number.

13220311212232 is a deficient number, since it is larger than the sum of its proper divisors (11567813769668).

13220311212232 is a wasteful number, since it uses less digits than its factorization.

13220311212232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763936 (or 2763932 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 13220311212232 its reverse (23221211302231), we get a palindrome (36441522514463).

The spelling of 13220311212232 in words is "thirteen trillion, two hundred twenty billion, three hundred eleven million, two hundred twelve thousand, two hundred thirty-two".