21106233273 has 8 divisors (see below), whose sum is σ = 28171681888. Its totient is φ = 14055803424.

The previous prime is 21106233221. The next prime is 21106233293. The reversal of 21106233273 is 37233260112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21106233273 - 2⁶ = 21106233209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21106233273.

It is not an unprimeable number, because it can be changed into a prime (21106233293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3751411 + ... + 3757032.

It is an arithmetic number, because the mean of its divisors is an integer number (3521460236).

Almost surely, 2^21106233273 is an apocalyptic number.

It is an amenable number.

21106233273 is a deficient number, since it is larger than the sum of its proper divisors (7065448615).

21106233273 is an equidigital number, since it uses as much as digits as its factorization.

21106233273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7509383.

The product of its (nonzero) digits is 9072, while the sum is 30.

Adding to 21106233273 its reverse (37233260112), we get a palindrome (58339493385).

The spelling of 21106233273 in words is "twenty-one billion, one hundred six million, two hundred thirty-three thousand, two hundred seventy-three".