13212122312 has 8 divisors (see below), whose sum is σ = 24772729350. Its totient is φ = 6606061152.

The previous prime is 13212122311. The next prime is 13212122333. The reversal of 13212122312 is 21322121231.

It can be written as a sum of positive squares in only one way, i.e., 11336712676 + 1875409636 = 106474^2 + 43306^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (13212122311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825757637 + ... + 825757652.

Almost surely, 2^13212122312 is an apocalyptic number.

It is an amenable number.

13212122312 is a deficient number, since it is larger than the sum of its proper divisors (11560607038).

13212122312 is a wasteful number, since it uses less digits than its factorization.

13212122312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651515295 (or 1651515291 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 13212122312 its reverse (21322121231), we get a palindrome (34534243543).

The spelling of 13212122312 in words is "thirteen billion, two hundred twelve million, one hundred twenty-two thousand, three hundred twelve".