13212120224 has 48 divisors (see below), whose sum is σ = 26230820616. Its totient is φ = 6550502400.

The previous prime is 13212120223. The next prime is 13212120281. The reversal of 13212120224 is 42202121231.

It can be written as a sum of positive squares in 4 ways, for example, as 12041111824 + 1171008400 = 109732^2 + 34220^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13212120196 and 13212120205.

It is not an unprimeable number, because it can be changed into a prime (13212120223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2715554 + ... + 2720414.

Almost surely, 2^13212120224 is an apocalyptic number.

It is an amenable number.

13212120224 is a deficient number, since it is larger than the sum of its proper divisors (13018700392).

13212120224 is a wasteful number, since it uses less digits than its factorization.

13212120224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5569 (or 5561 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 13212120224 its reverse (42202121231), we get a palindrome (55414241455).

The spelling of 13212120224 in words is "thirteen billion, two hundred twelve million, one hundred twenty thousand, two hundred twenty-four".