21110199967 has 2 divisors, whose sum is σ = 21110199968. Its totient is φ = 21110199966.

The previous prime is 21110199881. The next prime is 21110200003. The reversal of 21110199967 is 76999101112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110199967 - 2⁷ = 21110199839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110191967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555099983 + 10555099984.

It is an arithmetic number, because the mean of its divisors is an integer number (10555099984).

Almost surely, 2^21110199967 is an apocalyptic number.

21110199967 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110199967 is an equidigital number, since it uses as much as digits as its factorization.

21110199967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 46.

The spelling of 21110199967 in words is "twenty-one billion, one hundred ten million, one hundred ninety-nine thousand, nine hundred sixty-seven".