21210303113 has 8 divisors (see below), whose sum is σ = 22462373160. Its totient is φ = 19958722560.

The previous prime is 21210303097. The next prime is 21210303161. The reversal of 21210303113 is 31130301212.

It can be written as a sum of positive squares in 4 ways, for example, as 18645083209 + 2565219904 = 136547^2 + 50648^2 .

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 21210303113 - 2⁴ = 21210303097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210303091 and 21210303100.

It is not an unprimeable number, because it can be changed into a prime (21210363113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31208 + ... + 208313.

It is an arithmetic number, because the mean of its divisors is an integer number (2807796645).

Almost surely, 2^21210303113 is an apocalyptic number.

It is an amenable number.

21210303113 is a deficient number, since it is larger than the sum of its proper divisors (1252070047).

21210303113 is a wasteful number, since it uses less digits than its factorization.

21210303113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244747.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21210303113 its reverse (31130301212), we get a palindrome (52340604325).

The spelling of 21210303113 in words is "twenty-one billion, two hundred ten million, three hundred three thousand, one hundred thirteen".