221021210112011 has 16 divisors (see below), whose sum is σ = 231288522854400. Its totient is φ = 210808851129888.

The previous prime is 221021210111983. The next prime is 221021210112029. The reversal of 221021210112011 is 110211012120122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221021210112011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221021210112511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65191025 + ... + 68497533.

It is an arithmetic number, because the mean of its divisors is an integer number (14455532678400).

Almost surely, 2^{221021210112011} is an apocalyptic number.

221021210112011 is a deficient number, since it is larger than the sum of its proper divisors (10267312742389).

221021210112011 is a wasteful number, since it uses less digits than its factorization.

221021210112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314818.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221021210112011 its reverse (110211012120122), we get a palindrome (331232222232133).

The spelling of 221021210112011 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred ten million, one hundred twelve thousand, eleven".