13220121111112 has 16 divisors (see below), whose sum is σ = 24854182121340. Its totient is φ = 6592339212096.

The previous prime is 13220121111101. The next prime is 13220121111133. The reversal of 13220121111112 is 21111112102231.

It can be written as a sum of positive squares in 2 ways, for example, as 12022904368836 + 1197216742276 = 3467406^2 + 1094174^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13220121111112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215164763 + ... + 2215170730.

Almost surely, 2^{13220121111112} is an apocalyptic number.

It is an amenable number.

13220121111112 is a deficient number, since it is larger than the sum of its proper divisors (11634061010228).

13220121111112 is a wasteful number, since it uses less digits than its factorization.

13220121111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430335872 (or 4430335868 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 13220121111112 its reverse (21111112102231), we get a palindrome (34331233213343).

The spelling of 13220121111112 in words is "thirteen trillion, two hundred twenty billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twelve".