221201120100001 has 8 divisors (see below), whose sum is σ = 224232735767040. Its totient is φ = 218169543982752.

The previous prime is 221201120099983. The next prime is 221201120100017. The reversal of 221201120100001 is 100001021102122.

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

It is a cyclic number.

It is not a de Polignac number, because 221201120100001 - 2²¹ = 221201118002849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221201120100041) 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, 1463856 + ... + 21084238.

It is an arithmetic number, because the mean of its divisors is an integer number (28029091970880).

Almost surely, 2^{221201120100001} is an apocalyptic number.

It is an amenable number.

221201120100001 is a deficient number, since it is larger than the sum of its proper divisors (3031615667039).

221201120100001 is a wasteful number, since it uses less digits than its factorization.

221201120100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19774895.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221201120100001 its reverse (100001021102122), we get a palindrome (321202141202123).

The spelling of 221201120100001 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred twenty million, one hundred thousand, one".