221201002011 has 16 divisors (see below), whose sum is σ = 332841634560. Its totient is φ = 129438412320.

The previous prime is 221201001947. The next prime is 221201002027. The reversal of 221201002011 is 110200102122.

221201002011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221201002011 - 2⁶ = 221201001947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221201002081) 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, 115569055 + ... + 115570968.

It is an arithmetic number, because the mean of its divisors is an integer number (20802602160).

Almost surely, 2^221201002011 is an apocalyptic number.

221201002011 is a deficient number, since it is larger than the sum of its proper divisors (111640632549).

221201002011 is a wasteful number, since it uses less digits than its factorization.

221201002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231140066.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221201002011 its reverse (110200102122), we get a palindrome (331401104133).

The spelling of 221201002011 in words is "two hundred twenty-one billion, two hundred one million, two thousand, eleven".