221101100210001 has 16 divisors (see below), whose sum is σ = 321701819094720. Its totient is φ = 133958908965120.

The previous prime is 221101100209987. The next prime is 221101100210033. The reversal of 221101100210001 is 100012001101122.

It is not a de Polignac number, because 221101100210001 - 2³⁰ = 221100026468177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221101100210701) 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, 1043838220 + ... + 1044050013.

It is an arithmetic number, because the mean of its divisors is an integer number (20106363693420).

Almost surely, 2^{221101100210001} is an apocalyptic number.

It is an amenable number.

221101100210001 is a deficient number, since it is larger than the sum of its proper divisors (100600718884719).

221101100210001 is a wasteful number, since it uses less digits than its factorization.

221101100210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087891456.

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

Adding to 221101100210001 its reverse (100012001101122), we get a palindrome (321113101311123).

The spelling of 221101100210001 in words is "two hundred twenty-one trillion, one hundred one billion, one hundred million, two hundred ten thousand, one".