221221001220227 has 2 divisors, whose sum is σ = 221221001220228. Its totient is φ = 221221001220226.

The previous prime is 221221001220221. The next prime is 221221001220229. The reversal of 221221001220227 is 722022100122122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221221001220227 - 2²⁶ = 221220934111363 is a prime.

Together with 221221001220229, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 221221001220196 and 221221001220205.

It is not a weakly prime, because it can be changed into another prime (221221001220221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610500610113 + 110610500610114.

It is an arithmetic number, because the mean of its divisors is an integer number (110610500610114).

Almost surely, 2^{221221001220227} is an apocalyptic number.

221221001220227 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221001220227 is an equidigital number, since it uses as much as digits as its factorization.

221221001220227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 26.

Adding to 221221001220227 its reverse (722022100122122), we get a palindrome (943243101342349).

The spelling of 221221001220227 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, one million, two hundred twenty thousand, two hundred twenty-seven".