99021100001 has 4 divisors (see below), whose sum is σ = 99125005572. Its totient is φ = 98917194432.

The previous prime is 99021099977. The next prime is 99021100069. The reversal of 99021100001 is 10000112099.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31179083776 + 67842016225 = 176576^2 + 260465^2 .

It is a cyclic number.

It is not a de Polignac number, because 99021100001 - 2⁶ = 99021099937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99021100001.

It is not an unprimeable number, because it can be changed into a prime (99021100301) 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, 51951356 + ... + 51953261.

It is an arithmetic number, because the mean of its divisors is an integer number (24781251393).

Almost surely, 2^99021100001 is an apocalyptic number.

It is an amenable number.

99021100001 is a deficient number, since it is larger than the sum of its proper divisors (103905571).

99021100001 is a wasteful number, since it uses less digits than its factorization.

99021100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103905570.

The product of its (nonzero) digits is 162, while the sum is 23.

The spelling of 99021100001 in words is "ninety-nine billion, twenty-one million, one hundred thousand, one".