221001201220011 has 4 divisors (see below), whose sum is σ = 294668268293352. Its totient is φ = 147334134146672.

The previous prime is 221001201219977. The next prime is 221001201220027. The reversal of 221001201220011 is 110022102100122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221001201220011 - 2⁹ = 221001201219499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221001201220061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36833533536666 + ... + 36833533536671.

It is an arithmetic number, because the mean of its divisors is an integer number (73667067073338).

Almost surely, 2^{221001201220011} is an apocalyptic number.

221001201220011 is a deficient number, since it is larger than the sum of its proper divisors (73667067073341).

221001201220011 is an equidigital number, since it uses as much as digits as its factorization.

221001201220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73667067073340.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221001201220011 its reverse (110022102100122), we get a palindrome (331023303320133).

The spelling of 221001201220011 in words is "two hundred twenty-one trillion, one billion, two hundred one million, two hundred twenty thousand, eleven".