221100212221011 has 6 divisors (see below), whose sum is σ = 319366973208140. Its totient is φ = 147400141480668.

The previous prime is 221100212221001. The next prime is 221100212221019. The reversal of 221100212221011 is 110122212001122.

221100212221011 is a `hidden beast` number, since 221 + 1 + 0 + 0 + 212 + 221 + 0 + 11 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-221100212221011 is a prime.

It is a super-2 number, since 2×221100212221011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221100212221019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12283345123381 + ... + 12283345123398.

Almost surely, 2^{221100212221011} is an apocalyptic number.

221100212221011 is a deficient number, since it is larger than the sum of its proper divisors (98266760987129).

221100212221011 is a wasteful number, since it uses less digits than its factorization.

221100212221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24566690246785 (or 24566690246782 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221100212221011 its reverse (110122212001122), we get a palindrome (331222424222133).

The spelling of 221100212221011 in words is "two hundred twenty-one trillion, one hundred billion, two hundred twelve million, two hundred twenty-one thousand, eleven".