212813122 has 16 divisors (see below), whose sum is σ = 329235192. Its totient is φ = 103092480.

The previous prime is 212813101. The next prime is 212813203. The reversal of 212813122 is 221318212.

It can be written as a sum of positive squares in 4 ways, for example, as 207619281 + 5193841 = 14409^2 + 2279^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212813093 and 212813102.

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, 11868 + ... + 23800.

Almost surely, 2^212813122 is an apocalyptic number.

212813122 is a deficient number, since it is larger than the sum of its proper divisors (116422070).

212813122 is a wasteful number, since it uses less digits than its factorization.

212813122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12213.

The product of its digits is 384, while the sum is 22.

The square root of 212813122 is about 14588.1157796338. The cubic root of 212813122 is about 597.0345547404.

The spelling of 212813122 in words is "two hundred twelve million, eight hundred thirteen thousand, one hundred twenty-two".