21110099611 has 2 divisors, whose sum is σ = 21110099612. Its totient is φ = 21110099610.

The previous prime is 21110099603. The next prime is 21110099671. The reversal of 21110099611 is 11699001112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110099611 - 2³ = 21110099603 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110099671) 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, 10555049805 + 10555049806.

It is an arithmetic number, because the mean of its divisors is an integer number (10555049806).

Almost surely, 2^21110099611 is an apocalyptic number.

21110099611 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110099611 is an equidigital number, since it uses as much as digits as its factorization.

21110099611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 31.

The spelling of 21110099611 in words is "twenty-one billion, one hundred ten million, ninety-nine thousand, six hundred eleven".