131212222 has 8 divisors (see below), whose sum is σ = 208395936. Its totient is φ = 61746912.

The previous prime is 131212199. The next prime is 131212223. The reversal of 131212222 is 222212131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 131212196 and 131212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131212223) 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, 1929558 + ... + 1929625.

It is an arithmetic number, because the mean of its divisors is an integer number (26049492).

Almost surely, 2^131212222 is an apocalyptic number.

131212222 is a deficient number, since it is larger than the sum of its proper divisors (77183714).

131212222 is a wasteful number, since it uses less digits than its factorization.

131212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859202.

The product of its digits is 96, while the sum is 16.

The square root of 131212222 is about 11454.7903516389. The cubic root of 131212222 is about 508.1494150980.

Adding to 131212222 its reverse (222212131), we get a palindrome (353424353).

Subtracting 131212222 from its reverse (222212131), we obtain a palindrome (90999909).

The spelling of 131212222 in words is "one hundred thirty-one million, two hundred twelve thousand, two hundred twenty-two".