21110099767 has 2 divisors, whose sum is σ = 21110099768. Its totient is φ = 21110099766.

The previous prime is 21110099743. The next prime is 21110099771. The reversal of 21110099767 is 76799001112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110099767 - 2¹¹ = 21110097719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21111099767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555049883 + 10555049884.

It is an arithmetic number, because the mean of its divisors is an integer number (10555049884).

Almost surely, 2^21110099767 is an apocalyptic number.

21110099767 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110099767 is an equidigital number, since it uses as much as digits as its factorization.

21110099767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 43.

The spelling of 21110099767 in words is "twenty-one billion, one hundred ten million, ninety-nine thousand, seven hundred sixty-seven".