131212219 has 4 divisors (see below), whose sum is σ = 131240296. Its totient is φ = 131184144.

The previous prime is 131212199. The next prime is 131212223. The reversal of 131212219 is 912212131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131212219 - 2¹¹ = 131210171 is a prime.

It is a super-2 number, since 2×131212219² = 34433292829807922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131212219.

It is not an unprimeable number, because it can be changed into a prime (131212019) 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, 5154 + ... + 16999.

It is an arithmetic number, because the mean of its divisors is an integer number (32810074).

Almost surely, 2^131212219 is an apocalyptic number.

131212219 is a deficient number, since it is larger than the sum of its proper divisors (28077).

131212219 is an equidigital number, since it uses as much as digits as its factorization.

131212219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28076.

The product of its digits is 216, while the sum is 22.

The square root of 131212219 is about 11454.7902206893. The cubic root of 131212219 is about 508.1494112253.

It can be divided in two parts, 1312 and 12219, that added together give a palindrome (13531).

The spelling of 131212219 in words is "one hundred thirty-one million, two hundred twelve thousand, two hundred nineteen".