221101102011 has 16 divisors (see below), whose sum is σ = 295075257120. Its totient is φ = 147263911680.

The previous prime is 221101101971. The next prime is 221101102021. The reversal of 221101102011 is 110201101122.

It is not a de Polignac number, because 221101102011 - 2²¹ = 221099004859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221101102021) 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, 17211951 + ... + 17224791.

It is an arithmetic number, because the mean of its divisors is an integer number (18442203570).

Almost surely, 2^221101102011 is an apocalyptic number.

221101102011 is a deficient number, since it is larger than the sum of its proper divisors (73974155109).

221101102011 is a wasteful number, since it uses less digits than its factorization.

221101102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17726.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221101102011 its reverse (110201101122), we get a palindrome (331302203133).

The spelling of 221101102011 in words is "two hundred twenty-one billion, one hundred one million, one hundred two thousand, eleven".