221121121211273 has 2 divisors, whose sum is σ = 221121121211274. Its totient is φ = 221121121211272.

The previous prime is 221121121211203. The next prime is 221121121211323. The reversal of 221121121211273 is 372112121121122.

221121121211273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217456224481609 + 3664896729664 = 14746397^2 + 1914392^2 .

It is a cyclic number.

It is not a de Polignac number, because 221121121211273 - 2¹² = 221121121207177 is a prime.

It is not a weakly prime, because it can be changed into another prime (221121121211203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560560605636 + 110560560605637.

It is an arithmetic number, because the mean of its divisors is an integer number (110560560605637).

Almost surely, 2^{221121121211273} is an apocalyptic number.

It is an amenable number.

221121121211273 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121121211273 is an equidigital number, since it uses as much as digits as its factorization.

221121121211273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 29.

Adding to 221121121211273 its reverse (372112121121122), we get a palindrome (593233242332395).

The spelling of 221121121211273 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred eleven thousand, two hundred seventy-three".