210420321113 has 4 divisors (see below), whose sum is σ = 211202553060. Its totient is φ = 209638089168.

The previous prime is 210420321103. The next prime is 210420321143. The reversal of 210420321113 is 311123024012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121551941449 + 88868379664 = 348643^2 + 298108^2 .

It is a cyclic number.

It is not a de Polignac number, because 210420321113 - 2³² = 206125353817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210420321103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391115570 + ... + 391116107.

It is an arithmetic number, because the mean of its divisors is an integer number (52800638265).

Almost surely, 2^210420321113 is an apocalyptic number.

It is an amenable number.

210420321113 is a deficient number, since it is larger than the sum of its proper divisors (782231947).

210420321113 is an equidigital number, since it uses as much as digits as its factorization.

210420321113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782231946.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 210420321113 its reverse (311123024012), we get a palindrome (521543345125).

The spelling of 210420321113 in words is "two hundred ten billion, four hundred twenty million, three hundred twenty-one thousand, one hundred thirteen".