221021000211 has 16 divisors (see below), whose sum is σ = 325358409600. Its totient is φ = 132338238720.

The previous prime is 221021000177. The next prime is 221021000251. The reversal of 221021000211 is 112000120122.

221021000211 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 221021000211 - 2³⁰ = 219947258387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221021000251) 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, 40344286 + ... + 40349763.

It is an arithmetic number, because the mean of its divisors is an integer number (20334900600).

Almost surely, 2^221021000211 is an apocalyptic number.

221021000211 is a deficient number, since it is larger than the sum of its proper divisors (104337409389).

221021000211 is a wasteful number, since it uses less digits than its factorization.

221021000211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80694146.

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

Adding to 221021000211 its reverse (112000120122), we get a palindrome (333021120333).

The spelling of 221021000211 in words is "two hundred twenty-one billion, twenty-one million, two hundred eleven", and thus it is an aban number.