221100122122001 has 8 divisors (see below), whose sum is σ = 224263325951808. Its totient is φ = 217959273090000.

The previous prime is 221100122121887. The next prime is 221100122122021. The reversal of 221100122122001 is 100221221001122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221100122122001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221100122122021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5588679530 + ... + 5588719091.

It is an arithmetic number, because the mean of its divisors is an integer number (28032915743976).

Almost surely, 2^{221100122122001} is an apocalyptic number.

It is an amenable number.

221100122122001 is a deficient number, since it is larger than the sum of its proper divisors (3163203829807).

221100122122001 is a wasteful number, since it uses less digits than its factorization.

221100122122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11177398903.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221100122122001 its reverse (100221221001122), we get a palindrome (321321343123123).

The spelling of 221100122122001 in words is "two hundred twenty-one trillion, one hundred billion, one hundred twenty-two million, one hundred twenty-two thousand, one".