221111002200121 has 16 divisors (see below), whose sum is σ = 242332866404928. Its totient is φ = 200077917177600.

The previous prime is 221111002200091. The next prime is 221111002200139. The reversal of 221111002200121 is 121002200111122.

It is not a de Polignac number, because 221111002200121 - 2¹⁷ = 221111002069049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221111002200095 and 221111002200104.

It is not an unprimeable number, because it can be changed into a prime (221111009200121) 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, 46965900 + ... + 51458893.

It is an arithmetic number, because the mean of its divisors is an integer number (15145804150308).

Almost surely, 2^{221111002200121} is an apocalyptic number.

It is an amenable number.

221111002200121 is a deficient number, since it is larger than the sum of its proper divisors (21221864204807).

221111002200121 is a wasteful number, since it uses less digits than its factorization.

221111002200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98425752.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221111002200121 its reverse (121002200111122), we get a palindrome (342113202311243).

The spelling of 221111002200121 in words is "two hundred twenty-one trillion, one hundred eleven billion, two million, two hundred thousand, one hundred twenty-one".