221242030042121 has 16 divisors (see below), whose sum is σ = 241394851600128. Its totient is φ = 201095862584400.

The previous prime is 221242030042073. The next prime is 221242030042153. The reversal of 221242030042121 is 121240030242122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221242030042121 - 2³⁰ = 221240956300297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221242030042921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2483504846 + ... + 2483593928.

It is an arithmetic number, because the mean of its divisors is an integer number (15087178225008).

Almost surely, 2^{221242030042121} is an apocalyptic number.

It is an amenable number.

221242030042121 is a deficient number, since it is larger than the sum of its proper divisors (20152821558007).

221242030042121 is a wasteful number, since it uses less digits than its factorization.

221242030042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123892.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 221242030042121 its reverse (121240030242122), we get a palindrome (342482060284243).

The spelling of 221242030042121 in words is "two hundred twenty-one trillion, two hundred forty-two billion, thirty million, forty-two thousand, one hundred twenty-one".