21210313303 has 8 divisors (see below), whose sum is σ = 21503804400. Its totient is φ = 20918048448.

The previous prime is 21210313283. The next prime is 21210313321. The reversal of 21210313303 is 30331301212.

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 21210313303 - 2¹³ = 21210305111 is a prime.

It is a super-2 number, since 2×21210313303² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210313373) 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, 271701 + ... + 340942.

It is an arithmetic number, because the mean of its divisors is an integer number (2687975550).

Almost surely, 2^21210313303 is an apocalyptic number.

21210313303 is a deficient number, since it is larger than the sum of its proper divisors (293491097).

21210313303 is an equidigital number, since it uses as much as digits as its factorization.

21210313303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613121.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21210313303 its reverse (30331301212), we get a palindrome (51541614515).

The spelling of 21210313303 in words is "twenty-one billion, two hundred ten million, three hundred thirteen thousand, three hundred three".