113221212 has 36 divisors (see below), whose sum is σ = 286072920. Its totient is φ = 34836672.

The previous prime is 113221211. The next prime is 113221217. The reversal of 113221212 is 212122311.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 113221191 and 113221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113221211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25887 + ... + 29942.

It is an arithmetic number, because the mean of its divisors is an integer number (7946470).

Almost surely, 2^113221212 is an apocalyptic number.

113221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

113221212 is an abundant number, since it is smaller than the sum of its proper divisors (172851708).

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

113221212 is a wasteful number, since it uses less digits than its factorization.

113221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55862 (or 55847 counting only the distinct ones).

The product of its digits is 48, while the sum is 15.

The square root of 113221212 is about 10640.5456626998. The cubic root of 113221212 is about 483.7740846264.

Adding to 113221212 its reverse (212122311), we get a palindrome (325343523).

It can be divided in two parts, 11 and 3221212, that added together give a palindrome (3221223).

The spelling of 113221212 in words is "one hundred thirteen million, two hundred twenty-one thousand, two hundred twelve".