221221414331243 has 2 divisors, whose sum is σ = 221221414331244. Its totient is φ = 221221414331242.

The previous prime is 221221414331233. The next prime is 221221414331249. The reversal of 221221414331243 is 342133414122122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221221414331243 - 2⁶ = 221221414331179 is a prime.

It is not a weakly prime, because it can be changed into another prime (221221414331249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610707165621 + 110610707165622.

It is an arithmetic number, because the mean of its divisors is an integer number (110610707165622).

Almost surely, 2^{221221414331243} is an apocalyptic number.

221221414331243 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221414331243 is an equidigital number, since it uses as much as digits as its factorization.

221221414331243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 35.

Adding to 221221414331243 its reverse (342133414122122), we get a palindrome (563354828453365).

The spelling of 221221414331243 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, four hundred fourteen million, three hundred thirty-one thousand, two hundred forty-three".