221012019967 has 2 divisors, whose sum is σ = 221012019968. Its totient is φ = 221012019966.

The previous prime is 221012019953. The next prime is 221012020007. The reversal of 221012019967 is 769910210122.

It is a happy number.

It is an a-pointer prime, because the next prime (221012020007) can be obtained adding 221012019967 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221012019967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012019937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506009983 + 110506009984.

It is an arithmetic number, because the mean of its divisors is an integer number (110506009984).

Almost surely, 2^221012019967 is an apocalyptic number.

221012019967 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012019967 is an equidigital number, since it uses as much as digits as its factorization.

221012019967 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 221012019967 in words is "two hundred twenty-one billion, twelve million, nineteen thousand, nine hundred sixty-seven".