212412622645 has 4 divisors (see below), whose sum is σ = 254895147180. Its totient is φ = 169930098112.

The previous prime is 212412622633. The next prime is 212412622651. The reversal of 212412622645 is 546226214212.

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 119988110449 + 92424512196 = 346393^2 + 304014^2 .

It is a cyclic number.

It is not a de Polignac number, because 212412622645 - 2¹¹ = 212412620597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21241262260 + ... + 21241262269.

It is an arithmetic number, because the mean of its divisors is an integer number (63723786795).

Almost surely, 2^212412622645 is an apocalyptic number.

It is an amenable number.

212412622645 is a deficient number, since it is larger than the sum of its proper divisors (42482524535).

212412622645 is an equidigital number, since it uses as much as digits as its factorization.

212412622645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42482524534.

The product of its digits is 92160, while the sum is 37.

Adding to 212412622645 its reverse (546226214212), we get a palindrome (758638836857).

The spelling of 212412622645 in words is "two hundred twelve billion, four hundred twelve million, six hundred twenty-two thousand, six hundred forty-five".