113101212 has 72 divisors (see below), whose sum is σ = 320374656. Its totient is φ = 30905952.

The previous prime is 113101211. The next prime is 113101213. The reversal of 113101212 is 212101311.

It is an interprime number because it is at equal distance from previous prime (113101211) and next prime (113101213).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113101211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9343 + ... + 17705.

It is an arithmetic number, because the mean of its divisors is an integer number (4449648).

Almost surely, 2^113101212 is an apocalyptic number.

113101212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113101212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160187328).

113101212 is an abundant number, since it is smaller than the sum of its proper divisors (207273444).

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

113101212 is a wasteful number, since it uses less digits than its factorization.

113101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8407 (or 8398 counting only the distinct ones).

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

The square root of 113101212 is about 10634.9053592404. The cubic root of 113101212 is about 483.6031113292.

Adding to 113101212 its reverse (212101311), we get a palindrome (325202523).

Subtracting 113101212 from its reverse (212101311), we obtain a palindrome (99000099).

The spelling of 113101212 in words is "one hundred thirteen million, one hundred one thousand, two hundred twelve".