201221109967 has 2 divisors, whose sum is σ = 201221109968. Its totient is φ = 201221109966.

The previous prime is 201221109913. The next prime is 201221110021. The reversal of 201221109967 is 769901122102.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (201221109913) and next prime (201221110021).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201221109967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201221109367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610554983 + 100610554984.

It is an arithmetic number, because the mean of its divisors is an integer number (100610554984).

Almost surely, 2^201221109967 is an apocalyptic number.

201221109967 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221109967 is an equidigital number, since it uses as much as digits as its factorization.

201221109967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The spelling of 201221109967 in words is "two hundred one billion, two hundred twenty-one million, one hundred nine thousand, nine hundred sixty-seven".