221110230310121 has 16 divisors (see below), whose sum is σ = 229733429936400. Its totient is φ = 212553747022848.

The previous prime is 221110230310111. The next prime is 221110230310127. The reversal of 221110230310121 is 121013032011122.

It can be written as a sum of positive squares in 8 ways, for example, as 23202872428096 + 197907357882025 = 4816936^2 + 14067955^2 .

It is not a de Polignac number, because 221110230310121 - 2³⁸ = 220835352403177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221110230310093 and 221110230310102.

It is not an unprimeable number, because it can be changed into a prime (221110230310127) 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, 90534695 + ... + 92944883.

It is an arithmetic number, because the mean of its divisors is an integer number (14358339371025).

Almost surely, 2^{221110230310121} is an apocalyptic number.

It is an amenable number.

221110230310121 is a deficient number, since it is larger than the sum of its proper divisors (8623199626279).

221110230310121 is a wasteful number, since it uses less digits than its factorization.

221110230310121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424028.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 221110230310121 its reverse (121013032011122), we get a palindrome (342123262321243).

The spelling of 221110230310121 in words is "two hundred twenty-one trillion, one hundred ten billion, two hundred thirty million, three hundred ten thousand, one hundred twenty-one".