212222221221205 has 32 divisors (see below), whose sum is σ = 279862984372608. Its totient is φ = 153534661920000.

The previous prime is 212222221221203. The next prime is 212222221221233. The reversal of 212222221221205 is 502122122222212.

It is a happy number.

It is not a de Polignac number, because 212222221221205 - 2¹ = 212222221221203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222221221203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105626079 + ... + 107616508.

It is an arithmetic number, because the mean of its divisors is an integer number (8745718261644).

Almost surely, 2^{212222221221205} is an apocalyptic number.

It is an amenable number.

212222221221205 is a deficient number, since it is larger than the sum of its proper divisors (67640763151403).

212222221221205 is a wasteful number, since it uses less digits than its factorization.

212222221221205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213242917.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 212222221221205 its reverse (502122122222212), we get a palindrome (714344343443417).

The spelling of 212222221221205 in words is "two hundred twelve trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred five".