221021002101211 has 16 divisors (see below), whose sum is σ = 246294535304160. Its totient is φ = 196932842346240.

The previous prime is 221021002101199. The next prime is 221021002101281. The reversal of 221021002101211 is 112101200120122.

It is not a de Polignac number, because 221021002101211 - 2¹⁹ = 221021001576923 is a prime.

It is a super-3 number, since 3×221021002101211³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221021002101281) 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 15 ways as a sum of consecutive naturals, for example, 75030645 + ... + 77920726.

It is an arithmetic number, because the mean of its divisors is an integer number (15393408456510).

Almost surely, 2^{221021002101211} is an apocalyptic number.

221021002101211 is a deficient number, since it is larger than the sum of its proper divisors (25273533202949).

221021002101211 is a wasteful number, since it uses less digits than its factorization.

221021002101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152955246.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221021002101211 its reverse (112101200120122), we get a palindrome (333122202221333).

The spelling of 221021002101211 in words is "two hundred twenty-one trillion, twenty-one billion, two million, one hundred one thousand, two hundred eleven".