212131212322 has 4 divisors (see below), whose sum is σ = 318196818486. Its totient is φ = 106065606160.

The previous prime is 212131212313. The next prime is 212131212329. The reversal of 212131212322 is 223212131212.

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

It can be written as a sum of positive squares in only one way, i.e., 109269252481 + 102861959841 = 330559^2 + 320721^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212131212293 and 212131212302.

It is not an unprimeable number, because it can be changed into a prime (212131212329) by changing a digit.

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 as a sum of consecutive naturals, namely, 53032803079 + ... + 53032803082.

Almost surely, 2^212131212322 is an apocalyptic number.

212131212322 is a deficient number, since it is larger than the sum of its proper divisors (106065606164).

212131212322 is a wasteful number, since it uses less digits than its factorization.

212131212322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106065606163.

The product of its digits is 576, while the sum is 22.

Adding to 212131212322 its reverse (223212131212), we get a palindrome (435343343534).

The spelling of 212131212322 in words is "two hundred twelve billion, one hundred thirty-one million, two hundred twelve thousand, three hundred twenty-two".