20211111113 has 4 divisors (see below), whose sum is σ = 21400000020. Its totient is φ = 19022222208.

The previous prime is 20211111073. The next prime is 20211111203. The reversal of 20211111113 is 31111111202.

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 13732792969 + 6478318144 = 117187^2 + 80488^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211111113 - 2¹⁶ = 20211045577 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 (20211111413) 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, 594444428 + ... + 594444461.

It is an arithmetic number, because the mean of its divisors is an integer number (5350000005).

Almost surely, 2^20211111113 is an apocalyptic number.

It is an amenable number.

20211111113 is a deficient number, since it is larger than the sum of its proper divisors (1188888907).

20211111113 is a wasteful number, since it uses less digits than its factorization.

20211111113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188888906.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 20211111113 its reverse (31111111202), we get a palindrome (51322222315).

The spelling of 20211111113 in words is "twenty billion, two hundred eleven million, one hundred eleven thousand, one hundred thirteen".