131122212 has 48 divisors (see below), whose sum is σ = 335724480. Its totient is φ = 39581568.

The previous prime is 131122181. The next prime is 131122247. The reversal of 131122212 is 212221131.

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 = 131122191 and 131122200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339 + ... + 16197.

It is an arithmetic number, because the mean of its divisors is an integer number (6994260).

Almost surely, 2^131122212 is an apocalyptic number.

131122212 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 131122212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167862240).

131122212 is an abundant number, since it is smaller than the sum of its proper divisors (204602268).

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

131122212 is a wasteful number, since it uses less digits than its factorization.

131122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15932 (or 15930 counting only the distinct ones).

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

The square root of 131122212 is about 11450.8607536726. The cubic root of 131122212 is about 508.0331937307.

Adding to 131122212 its reverse (212221131), we get a palindrome (343343343).

The spelling of 131122212 in words is "one hundred thirty-one million, one hundred twenty-two thousand, two hundred twelve".