212221010111001 has 32 divisors (see below), whose sum is σ = 292836077411328. Its totient is φ = 136601979433920.

The previous prime is 212221010110957. The next prime is 212221010111021. The reversal of 212221010111001 is 100111010122212.

It is a happy number.

It is not a de Polignac number, because 212221010111001 - 2¹¹ = 212221010108953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212221010111021) 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 31 ways as a sum of consecutive naturals, for example, 531812116 + ... + 532211018.

It is an arithmetic number, because the mean of its divisors is an integer number (9151127419104).

Almost surely, 2^{212221010111001} is an apocalyptic number.

It is an amenable number.

212221010111001 is a deficient number, since it is larger than the sum of its proper divisors (80615067300327).

212221010111001 is a wasteful number, since it uses less digits than its factorization.

212221010111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435661.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212221010111001 its reverse (100111010122212), we get a palindrome (312332020233213).

The spelling of 212221010111001 in words is "two hundred twelve trillion, two hundred twenty-one billion, ten million, one hundred eleven thousand, one".