212122245 has 8 divisors (see below), whose sum is σ = 339395616. Its totient is φ = 113131856.

The previous prime is 212122241. The next prime is 212122249. The reversal of 212122245 is 542221212.

It is an interprime number because it is at equal distance from previous prime (212122241) and next prime (212122249).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212122245 - 2² = 212122241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122241) 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 in 7 ways as a sum of consecutive naturals, for example, 7070727 + ... + 7070756.

It is an arithmetic number, because the mean of its divisors is an integer number (42424452).

Almost surely, 2^212122245 is an apocalyptic number.

It is an amenable number.

212122245 is a deficient number, since it is larger than the sum of its proper divisors (127273371).

212122245 is a wasteful number, since it uses less digits than its factorization.

212122245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14141491.

The product of its digits is 640, while the sum is 21.

The square root of 212122245 is about 14564.4170841129. The cubic root of 212122245 is about 596.3877828984.

Adding to 212122245 its reverse (542221212), we get a palindrome (754343457).

The spelling of 212122245 in words is "two hundred twelve million, one hundred twenty-two thousand, two hundred forty-five".