212194854913 has 4 divisors (see below), whose sum is σ = 224676905220. Its totient is φ = 199712804608.

The previous prime is 212194854899. The next prime is 212194854979. The reversal of 212194854913 is 319458491212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 94056915969 + 118137938944 = 306687^2 + 343712^2 .

It is a cyclic number.

It is not a de Polignac number, because 212194854913 - 2⁹ = 212194854401 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212194854713) 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, 6241025128 + ... + 6241025161.

It is an arithmetic number, because the mean of its divisors is an integer number (56169226305).

Almost surely, 2^212194854913 is an apocalyptic number.

It is an amenable number.

212194854913 is a deficient number, since it is larger than the sum of its proper divisors (12482050307).

212194854913 is a wasteful number, since it uses less digits than its factorization.

212194854913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12482050306.

The product of its digits is 622080, while the sum is 49.

The spelling of 212194854913 in words is "two hundred twelve billion, one hundred ninety-four million, eight hundred fifty-four thousand, nine hundred thirteen".