20210321113 has 4 divisors (see below), whose sum is σ = 20211378660. Its totient is φ = 20209263568.

The previous prime is 20210321083. The next prime is 20210321119. The reversal of 20210321113 is 31112301202.

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 10652716944 + 9557604169 = 103212^2 + 97763^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210321113 - 2²⁵ = 20176766681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210321119) 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, 499570 + ... + 538507.

It is an arithmetic number, because the mean of its divisors is an integer number (5052844665).

Almost surely, 2^20210321113 is an apocalyptic number.

It is an amenable number.

20210321113 is a deficient number, since it is larger than the sum of its proper divisors (1057547).

20210321113 is a wasteful number, since it uses less digits than its factorization.

20210321113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057546.

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

Adding to 20210321113 its reverse (31112301202), we get a palindrome (51322622315).

The spelling of 20210321113 in words is "twenty billion, two hundred ten million, three hundred twenty-one thousand, one hundred thirteen".