21793091101 has 4 divisors (see below), whose sum is σ = 21795782112. Its totient is φ = 21790400092.

The previous prime is 21793091093. The next prime is 21793091107. The reversal of 21793091101 is 10119039712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21793091101 - 2³ = 21793091093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21793091107) 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 in 3 ways as a sum of consecutive naturals, for example, 1333321 + ... + 1349566.

It is an arithmetic number, because the mean of its divisors is an integer number (5448945528).

Almost surely, 2^21793091101 is an apocalyptic number.

It is an amenable number.

21793091101 is a deficient number, since it is larger than the sum of its proper divisors (2691011).

21793091101 is an equidigital number, since it uses as much as digits as its factorization.

21793091101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691010.

The product of its (nonzero) digits is 3402, while the sum is 34.

The spelling of 21793091101 in words is "twenty-one billion, seven hundred ninety-three million, ninety-one thousand, one hundred one".