221000210001121 has 16 divisors (see below), whose sum is σ = 236202598195200. Its totient is φ = 206177613424848.

The previous prime is 221000210001091. The next prime is 221000210001127. The reversal of 221000210001121 is 121100012000122.

It is a cyclic number.

It is not a de Polignac number, because 221000210001121 - 2⁷ = 221000210000993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221000210001127) 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, 315091201 + ... + 315791806.

It is an arithmetic number, because the mean of its divisors is an integer number (14762662387200).

Almost surely, 2^{221000210001121} is an apocalyptic number.

It is an amenable number.

221000210001121 is a deficient number, since it is larger than the sum of its proper divisors (15202388194079).

221000210001121 is a wasteful number, since it uses less digits than its factorization.

221000210001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630883308.

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

Adding to 221000210001121 its reverse (121100012000122), we get a palindrome (342100222001243).

The spelling of 221000210001121 in words is "two hundred twenty-one trillion, two hundred ten million, one thousand, one hundred twenty-one".