212222100122201 has 24 divisors (see below), whose sum is σ = 233091347598360. Its totient is φ = 193110765120000.

The previous prime is 212222100122191. The next prime is 212222100122213. The reversal of 212222100122201 is 102221001222212.

It can be written as a sum of positive squares in 12 ways, for example, as 3685539890176 + 208536560232025 = 1919776^2 + 14440795^2 .

It is a de Polignac number, because none of the positive numbers 2^k-212222100122201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212222100128201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23237900 + ... + 31055501.

It is an arithmetic number, because the mean of its divisors is an integer number (9712139483265).

Almost surely, 2^{212222100122201} is an apocalyptic number.

It is an amenable number.

212222100122201 is a deficient number, since it is larger than the sum of its proper divisors (20869247476159).

212222100122201 is a wasteful number, since it uses less digits than its factorization.

212222100122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54293757 (or 54293744 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212222100122201 its reverse (102221001222212), we get a palindrome (314443101344413).

The spelling of 212222100122201 in words is "two hundred twelve trillion, two hundred twenty-two billion, one hundred million, one hundred twenty-two thousand, two hundred one".