221211210011 has 16 divisors (see below), whose sum is σ = 249680067840. Its totient is φ = 194137550880.

The previous prime is 221211210007. The next prime is 221211210013. The reversal of 221211210011 is 110012112122.

It is a cyclic number.

It is not a de Polignac number, because 221211210011 - 2² = 221211210007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221211210013) 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, 2244410 + ... + 2340896.

It is an arithmetic number, because the mean of its divisors is an integer number (15605004240).

Almost surely, 2^221211210011 is an apocalyptic number.

221211210011 is a deficient number, since it is larger than the sum of its proper divisors (28468857829).

221211210011 is a wasteful number, since it uses less digits than its factorization.

221211210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103714.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221211210011 its reverse (110012112122), we get a palindrome (331223322133).

The spelling of 221211210011 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, eleven".