221100212011 has 16 divisors (see below), whose sum is σ = 253683493888. Its totient is φ = 188766676800.

The previous prime is 221100211987. The next prime is 221100212027. The reversal of 221100212011 is 110212001122.

It is a cyclic number.

It is not a de Polignac number, because 221100212011 - 2¹¹ = 221100209963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221100211982 and 221100212000.

It is not an unprimeable number, because it can be changed into a prime (221100212041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8719231 + ... + 8744551.

It is an arithmetic number, because the mean of its divisors is an integer number (15855218368).

Almost surely, 2^221100212011 is an apocalyptic number.

221100212011 is a deficient number, since it is larger than the sum of its proper divisors (32583281877).

221100212011 is a wasteful number, since it uses less digits than its factorization.

221100212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30202.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221100212011 its reverse (110212001122), we get a palindrome (331312213133).

The spelling of 221100212011 in words is "two hundred twenty-one billion, one hundred million, two hundred twelve thousand, eleven".