13220112 has 20 divisors (see below), whose sum is σ = 34152080. Its totient is φ = 4406688.

The previous prime is 13220099. The next prime is 13220117. The reversal of 13220112 is 21102231.

It is a super-2 number, since 2×13220112² = 349542722585088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (13220117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137662 + ... + 137757.

It is an arithmetic number, because the mean of its divisors is an integer number (1707604).

Almost surely, 2^13220112 is an apocalyptic number.

13220112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13220112 is an abundant number, since it is smaller than the sum of its proper divisors (20931968).

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

13220112 is a wasteful number, since it uses less digits than its factorization.

13220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275430 (or 275424 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 13220112 is about 3635.9471943360. The cubic root of 13220112 is about 236.4531177789.

Adding to 13220112 its reverse (21102231), we get a palindrome (34322343).

The spelling of 13220112 in words is "thirteen million, two hundred twenty thousand, one hundred twelve".