221210220011 has 16 divisors (see below), whose sum is σ = 255616028640. Its totient is φ = 189196346880.

The previous prime is 221210219969. The next prime is 221210220041. The reversal of 221210220011 is 110022012122.

It is a cyclic number.

It is not a de Polignac number, because 221210220011 - 2³⁴ = 204030350827 is a prime.

It is a super-2 number, since 2×221210220011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221210220041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246845 + ... + 709473.

It is an arithmetic number, because the mean of its divisors is an integer number (15976001790).

Almost surely, 2^221210220011 is an apocalyptic number.

221210220011 is a deficient number, since it is larger than the sum of its proper divisors (34405808629).

221210220011 is a wasteful number, since it uses less digits than its factorization.

221210220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465214.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221210220011 its reverse (110022012122), we get a palindrome (331232232133).

The spelling of 221210220011 in words is "two hundred twenty-one billion, two hundred ten million, two hundred twenty thousand, eleven".