221121021067 has 2 divisors, whose sum is σ = 221121021068. Its totient is φ = 221121021066.

The previous prime is 221121021041. The next prime is 221121021083. The reversal of 221121021067 is 760120121122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221121021067 - 2²⁷ = 220986803339 is a prime.

It is not a weakly prime, because it can be changed into another prime (221121021467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560510533 + 110560510534.

It is an arithmetic number, because the mean of its divisors is an integer number (110560510534).

Almost surely, 2^221121021067 is an apocalyptic number.

221121021067 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121021067 is an equidigital number, since it uses as much as digits as its factorization.

221121021067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 221121021067 its reverse (760120121122), we get a palindrome (981241142189).

The spelling of 221121021067 in words is "two hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, sixty-seven".