221120002100001 has 24 divisors (see below), whose sum is σ = 303016777722624. Its totient is φ = 143426132377920.

The previous prime is 221120002099991. The next prime is 221120002100027. The reversal of 221120002100001 is 100001200021122.

It is not a de Polignac number, because 221120002100001 - 2⁷ = 221120002099873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221120002100001.

It is not an unprimeable number, because it can be changed into a prime (221120002108001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200656551 + ... + 201755523.

It is an arithmetic number, because the mean of its divisors is an integer number (12625699071776).

Almost surely, 2^{221120002100001} is an apocalyptic number.

It is an amenable number.

221120002100001 is a deficient number, since it is larger than the sum of its proper divisors (81896775622623).

221120002100001 is a wasteful number, since it uses less digits than its factorization.

221120002100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148041 (or 1148004 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221120002100001 its reverse (100001200021122), we get a palindrome (321121202121123).

The spelling of 221120002100001 in words is "two hundred twenty-one trillion, one hundred twenty billion, two million, one hundred thousand, one".