21110099671 has 2 divisors, whose sum is σ = 21110099672. Its totient is φ = 21110099670.

The previous prime is 21110099611. The next prime is 21110099677. The reversal of 21110099671 is 17699001112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110099671 - 2⁹ = 21110099159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21110099671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110099677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555049835 + 10555049836.

It is an arithmetic number, because the mean of its divisors is an integer number (10555049836).

Almost surely, 2^21110099671 is an apocalyptic number.

21110099671 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110099671 is an equidigital number, since it uses as much as digits as its factorization.

21110099671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 37.

The spelling of 21110099671 in words is "twenty-one billion, one hundred ten million, ninety-nine thousand, six hundred seventy-one".