221101100202011 has 4 divisors (see below), whose sum is σ = 222457548669672. Its totient is φ = 219744651734352.

The previous prime is 221101100201983. The next prime is 221101100202083. The reversal of 221101100202011 is 110202001101122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221101100202011 - 2²² = 221101096007707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221101100204011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678224233586 + ... + 678224233911.

It is an arithmetic number, because the mean of its divisors is an integer number (55614387167418).

Almost surely, 2^{221101100202011} is an apocalyptic number.

221101100202011 is a deficient number, since it is larger than the sum of its proper divisors (1356448467661).

221101100202011 is a wasteful number, since it uses less digits than its factorization.

221101100202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356448467660.

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

Adding to 221101100202011 its reverse (110202001101122), we get a palindrome (331303101303133).

The spelling of 221101100202011 in words is "two hundred twenty-one trillion, one hundred one billion, one hundred million, two hundred two thousand, eleven".