20211110099 has 4 divisors (see below), whose sum is σ = 20908044960. Its totient is φ = 19514175240.

The previous prime is 20211110071. The next prime is 20211110107. The reversal of 20211110099 is 99001111202.

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-20211110099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211110069) 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, 348467387 + ... + 348467444.

It is an arithmetic number, because the mean of its divisors is an integer number (5227011240).

Almost surely, 2^20211110099 is an apocalyptic number.

20211110099 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20211110099 is a deficient number, since it is larger than the sum of its proper divisors (696934861).

20211110099 is an equidigital number, since it uses as much as digits as its factorization.

20211110099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696934860.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 20211110099 in words is "twenty billion, two hundred eleven million, one hundred ten thousand, ninety-nine".