13111103221212 has 48 divisors (see below), whose sum is σ = 31649939798400. Its totient is φ = 4219338836160.

The previous prime is 13111103221211. The next prime is 13111103221231. The reversal of 13111103221212 is 21212230111131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111103221211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3065287 + ... + 5968097.

It is an arithmetic number, because the mean of its divisors is an integer number (659373745800).

Almost surely, 2^{13111103221212} is an apocalyptic number.

13111103221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13111103221212 is an abundant number, since it is smaller than the sum of its proper divisors (18538836577188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13111103221212 is a wasteful number, since it uses less digits than its factorization.

13111103221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915826 (or 2915824 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 13111103221212 its reverse (21212230111131), we get a palindrome (34323333332343).

The spelling of 13111103221212 in words is "thirteen trillion, one hundred eleven billion, one hundred three million, two hundred twenty-one thousand, two hundred twelve".