212221202111001 has 48 divisors (see below), whose sum is σ = 313513817760000. Its totient is φ = 138298754131200.

The previous prime is 212221202110927. The next prime is 212221202111003. The reversal of 212221202111001 is 100111202122212.

212221202111001 is a `hidden beast` number, since 212 + 22 + 120 + 211 + 100 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-212221202111001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212221202111003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1382931325 + ... + 1383084773.

It is an arithmetic number, because the mean of its divisors is an integer number (6531537870000).

Almost surely, 2^{212221202111001} is an apocalyptic number.

It is an amenable number.

212221202111001 is a deficient number, since it is larger than the sum of its proper divisors (101292615648999).

212221202111001 is a wasteful number, since it uses less digits than its factorization.

212221202111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172894 (or 172891 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212221202111001 its reverse (100111202122212), we get a palindrome (312332404233213).

The spelling of 212221202111001 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred two million, one hundred eleven thousand, one".