112131220 has 12 divisors (see below), whose sum is σ = 235475604. Its totient is φ = 44852480.

The previous prime is 112131203. The next prime is 112131277. The reversal of 112131220 is 22131211.

It can be written as a sum of positive squares in 2 ways, for example, as 75794436 + 36336784 = 8706^2 + 6028^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 112131220.

It is a congruent number.

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, 2803261 + ... + 2803300.

It is an arithmetic number, because the mean of its divisors is an integer number (19622967).

Almost surely, 2^112131220 is an apocalyptic number.

112131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

112131220 is an abundant number, since it is smaller than the sum of its proper divisors (123344384).

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

112131220 is a wasteful number, since it uses less digits than its factorization.

112131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606570 (or 5606568 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 112131220 is about 10589.2029917270. The cubic root of 112131220 is about 482.2166286909.

Adding to 112131220 its reverse (22131211), we get a palindrome (134262431).

Subtracting from 112131220 its reverse (22131211), we obtain a palindrome (90000009).

The spelling of 112131220 in words is "one hundred twelve million, one hundred thirty-one thousand, two hundred twenty".