221112031310221 has 2 divisors, whose sum is σ = 221112031310222. Its totient is φ = 221112031310220.

The previous prime is 221112031310201. The next prime is 221112031310243. The reversal of 221112031310221 is 122013130211122.

It is a happy number.

It is an a-pointer prime, because the next prime (221112031310243) can be obtained adding 221112031310221 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209648999106121 + 11463032204100 = 14479261^2 + 3385710^2 .

It is a cyclic number.

It is not a de Polignac number, because 221112031310221 - 2¹¹ = 221112031308173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221112031310192 and 221112031310201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221112031310201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556015655110 + 110556015655111.

It is an arithmetic number, because the mean of its divisors is an integer number (110556015655111).

Almost surely, 2^{221112031310221} is an apocalyptic number.

It is an amenable number.

221112031310221 is a deficient number, since it is larger than the sum of its proper divisors (1).

221112031310221 is an equidigital number, since it uses as much as digits as its factorization.

221112031310221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 221112031310221 its reverse (122013130211122), we get a palindrome (343125161521343).

The spelling of 221112031310221 in words is "two hundred twenty-one trillion, one hundred twelve billion, thirty-one million, three hundred ten thousand, two hundred twenty-one".