221424040411121 has 2 divisors, whose sum is σ = 221424040411122. Its totient is φ = 221424040411120.

The previous prime is 221424040411111. The next prime is 221424040411139. The reversal of 221424040411121 is 121114040424122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214873967616400 + 6550072794721 = 14658580^2 + 2559311^2 .

It is a cyclic number.

It is not a de Polignac number, because 221424040411121 - 2⁴² = 217025993900017 is a prime.

It is not a weakly prime, because it can be changed into another prime (221424040411111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110712020205560 + 110712020205561.

It is an arithmetic number, because the mean of its divisors is an integer number (110712020205561).

Almost surely, 2^{221424040411121} is an apocalyptic number.

It is an amenable number.

221424040411121 is a deficient number, since it is larger than the sum of its proper divisors (1).

221424040411121 is an equidigital number, since it uses as much as digits as its factorization.

221424040411121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4096, while the sum is 29.

Adding to 221424040411121 its reverse (121114040424122), we get a palindrome (342538080835243).

The spelling of 221424040411121 in words is "two hundred twenty-one trillion, four hundred twenty-four billion, forty million, four hundred eleven thousand, one hundred twenty-one".