212131322 has 16 divisors (see below), whose sum is σ = 346527720. Its totient is φ = 96805632.

The previous prime is 212131319. The next prime is 212131363. The reversal of 212131322 is 223131212.

It can be written as a sum of positive squares in 4 ways, for example, as 99580441 + 112550881 = 9979^2 + 10609^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212131322.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43523 + ... + 48150.

Almost surely, 2^212131322 is an apocalyptic number.

212131322 is a deficient number, since it is larger than the sum of its proper divisors (134396398).

212131322 is a wasteful number, since it uses less digits than its factorization.

212131322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91777.

The product of its digits is 144, while the sum is 17.

The square root of 212131322 is about 14564.7286964090. The cubic root of 212131322 is about 596.3962895258.

Adding to 212131322 its reverse (223131212), we get a palindrome (435262534).

The spelling of 212131322 in words is "two hundred twelve million, one hundred thirty-one thousand, three hundred twenty-two".