221210121227 has 2 divisors, whose sum is σ = 221210121228. Its totient is φ = 221210121226.

The previous prime is 221210121203. The next prime is 221210121239. The reversal of 221210121227 is 722121012122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221210121227 - 2¹² = 221210117131 is a prime.

It is not a weakly prime, because it can be changed into another prime (221210121127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605060613 + 110605060614.

It is an arithmetic number, because the mean of its divisors is an integer number (110605060614).

Almost surely, 2^221210121227 is an apocalyptic number.

221210121227 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210121227 is an equidigital number, since it uses as much as digits as its factorization.

221210121227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 221210121227 its reverse (722121012122), we get a palindrome (943331133349).

The spelling of 221210121227 in words is "two hundred twenty-one billion, two hundred ten million, one hundred twenty-one thousand, two hundred twenty-seven".