13011221212 has 48 divisors (see below), whose sum is σ = 25116537600. Its totient is φ = 5848594560.

The previous prime is 13011221191. The next prime is 13011221213. The reversal of 13011221212 is 21212211031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13011221213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1604464 + ... + 1612552.

It is an arithmetic number, because the mean of its divisors is an integer number (523261200).

Almost surely, 2^13011221212 is an apocalyptic number.

It is an amenable number.

13011221212 is a deficient number, since it is larger than the sum of its proper divisors (12105316388).

13011221212 is a wasteful number, since it uses less digits than its factorization.

13011221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8506 (or 8504 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 13011221212 its reverse (21212211031), we get a palindrome (34223432243).

The spelling of 13011221212 in words is "thirteen billion, eleven million, two hundred twenty-one thousand, two hundred twelve".