221121021121267 has 2 divisors, whose sum is σ = 221121021121268. Its totient is φ = 221121021121266.

The previous prime is 221121021121199. The next prime is 221121021121271. The reversal of 221121021121267 is 762121120121122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221121021121267 - 2⁷ = 221121021121139 is a prime.

It is not a weakly prime, because it can be changed into another prime (221121021121067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560510560633 + 110560510560634.

It is an arithmetic number, because the mean of its divisors is an integer number (110560510560634).

Almost surely, 2^{221121021121267} is an apocalyptic number.

221121021121267 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121021121267 is an equidigital number, since it uses as much as digits as its factorization.

221121021121267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

Adding to 221121021121267 its reverse (762121120121122), we get a palindrome (983242141242389).

The spelling of 221121021121267 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, twenty-one million, one hundred twenty-one thousand, two hundred sixty-seven".