21123323301 has 8 divisors (see below), whose sum is σ = 28166026144. Its totient is φ = 14081418000.

The previous prime is 21123323297. The next prime is 21123323323. The reversal of 21123323301 is 10332332112.

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

It is not a de Polignac number, because 21123323301 - 2² = 21123323297 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 (21123323341) 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 7 ways as a sum of consecutive naturals, for example, 134575 + ... + 245676.

It is an arithmetic number, because the mean of its divisors is an integer number (3520753268).

Almost surely, 2^21123323301 is an apocalyptic number.

It is an amenable number.

21123323301 is a deficient number, since it is larger than the sum of its proper divisors (7042702843).

21123323301 is a wasteful number, since it uses less digits than its factorization.

21123323301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398771.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21123323301 its reverse (10332332112), we get a palindrome (31455655413).

The spelling of 21123323301 in words is "twenty-one billion, one hundred twenty-three million, three hundred twenty-three thousand, three hundred one".