20213211113 has 4 divisors (see below), whose sum is σ = 20213667540. Its totient is φ = 20212754688.

The previous prime is 20213211101. The next prime is 20213211121. The reversal of 20213211113 is 31111231202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31111231202 = 2 ⋅15555615601.

It can be written as a sum of positive squares in 2 ways, for example, as 2672062864 + 17541148249 = 51692^2 + 132443^2 .

It is a cyclic number.

It is not a de Polignac number, because 20213211113 - 2¹⁰ = 20213210089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213211091 and 20213211100.

It is not an unprimeable number, because it can be changed into a prime (20213211133) 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, 153668 + ... + 253061.

It is an arithmetic number, because the mean of its divisors is an integer number (5053416885).

Almost surely, 2^20213211113 is an apocalyptic number.

It is an amenable number.

20213211113 is a deficient number, since it is larger than the sum of its proper divisors (456427).

20213211113 is an equidigital number, since it uses as much as digits as its factorization.

20213211113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456426.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20213211113 its reverse (31111231202), we get a palindrome (51324442315).

The spelling of 20213211113 in words is "twenty billion, two hundred thirteen million, two hundred eleven thousand, one hundred thirteen".