131222212 has 24 divisors (see below), whose sum is σ = 250810560. Its totient is φ = 59576160.

The previous prime is 131222209. The next prime is 131222237. The reversal of 131222212 is 212222131.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61833 + ... + 63919.

It is an arithmetic number, because the mean of its divisors is an integer number (10450440).

Almost surely, 2^131222212 is an apocalyptic number.

It is an amenable number.

131222212 is a deficient number, since it is larger than the sum of its proper divisors (119588348).

131222212 is a wasteful number, since it uses less digits than its factorization.

131222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3531 (or 3529 counting only the distinct ones).

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

The square root of 131222212 is about 11455.2264054448. The cubic root of 131222212 is about 508.1623109593.

Adding to 131222212 its reverse (212222131), we get a palindrome (343444343).

It can be divided in two parts, 1 and 31222212, that added together give a palindrome (31222213).

The spelling of 131222212 in words is "one hundred thirty-one million, two hundred twenty-two thousand, two hundred twelve".