21110099968 has 26 divisors (see below), whose sum is σ = 42215054294. Its totient is φ = 10555047936.

The previous prime is 21110099909. The next prime is 21110099971. The reversal of 21110099968 is 86999001112.

It can be written as a sum of positive squares in only one way, i.e., 18969001984 + 2141097984 = 137728^2 + 46272^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2572821 + ... + 2581012.

Almost surely, 2^21110099968 is an apocalyptic number.

It is an amenable number.

21110099968 is a deficient number, since it is larger than the sum of its proper divisors (21104954326).

21110099968 is an frugal number, since it uses more digits than its factorization.

21110099968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5153857 (or 5153835 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 46.

The spelling of 21110099968 in words is "twenty-one billion, one hundred ten million, ninety-nine thousand, nine hundred sixty-eight".