212122222221201 has 4 divisors (see below), whose sum is σ = 282829629628272. Its totient is φ = 141414814814132.

The previous prime is 212122222221199. The next prime is 212122222221253. The reversal of 212122222221201 is 102122222221212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212122222221201 - 2¹ = 212122222221199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212122222221101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35353703703531 + ... + 35353703703536.

It is an arithmetic number, because the mean of its divisors is an integer number (70707407407068).

Almost surely, 2^{212122222221201} is an apocalyptic number.

It is an amenable number.

212122222221201 is a deficient number, since it is larger than the sum of its proper divisors (70707407407071).

212122222221201 is an equidigital number, since it uses as much as digits as its factorization.

212122222221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70707407407070.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 212122222221201 its reverse (102122222221212), we get a palindrome (314244444442413).

The spelling of 212122222221201 in words is "two hundred twelve trillion, one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred one".