99021680011 has 4 divisors (see below), whose sum is σ = 104233347400. Its totient is φ = 93810012624.

The previous prime is 99021679961. The next prime is 99021680057. The reversal of 99021680011 is 11008612099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99021680011 is a prime.

It is a super-2 number, since 2×99021680011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99021684011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2605833666 + ... + 2605833703.

It is an arithmetic number, because the mean of its divisors is an integer number (26058336850).

Almost surely, 2^99021680011 is an apocalyptic number.

99021680011 is a deficient number, since it is larger than the sum of its proper divisors (5211667389).

99021680011 is a wasteful number, since it uses less digits than its factorization.

99021680011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211667388.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 99021680011 in words is "ninety-nine billion, twenty-one million, six hundred eighty thousand, eleven".