21210203320113 has 16 divisors (see below), whose sum is σ = 28406114856000. Its totient is φ = 14077223880000.

The previous prime is 21210203320073. The next prime is 21210203320129. The reversal of 21210203320113 is 31102330201212.

It is not a de Polignac number, because 21210203320113 - 2²¹ = 21210201222961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21210203320113.

It is not an unprimeable number, because it can be changed into a prime (21210203320183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7075738 + ... + 9616988.

It is an arithmetic number, because the mean of its divisors is an integer number (1775382178500).

Almost surely, 2^{21210203320113} is an apocalyptic number.

It is an amenable number.

21210203320113 is a deficient number, since it is larger than the sum of its proper divisors (7195911535887).

21210203320113 is a wasteful number, since it uses less digits than its factorization.

21210203320113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553632.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21210203320113 its reverse (31102330201212), we get a palindrome (52312533521325).

The spelling of 21210203320113 in words is "twenty-one trillion, two hundred ten billion, two hundred three million, three hundred twenty thousand, one hundred thirteen".