21102303121 has 8 divisors (see below), whose sum is σ = 21164863104. Its totient is φ = 21039816720.

The previous prime is 21102303113. The next prime is 21102303169. The reversal of 21102303121 is 12130320112.

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

It is a cyclic number.

It is not a de Polignac number, because 21102303121 - 2³ = 21102303113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21102303095 and 21102303104.

It is not an unprimeable number, because it can be changed into a prime (21102303221) 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, 585016 + ... + 620038.

It is an arithmetic number, because the mean of its divisors is an integer number (2645607888).

Almost surely, 2^21102303121 is an apocalyptic number.

It is an amenable number.

21102303121 is a deficient number, since it is larger than the sum of its proper divisors (62559983).

21102303121 is a wasteful number, since it uses less digits than its factorization.

21102303121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36791.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21102303121 its reverse (12130320112), we get a palindrome (33232623233).

The spelling of 21102303121 in words is "twenty-one billion, one hundred two million, three hundred three thousand, one hundred twenty-one".