20011320221113 has 4 divisors (see below), whose sum is σ = 21550652545828. Its totient is φ = 18471987896400.

The previous prime is 20011320221069. The next prime is 20011320221129. The reversal of 20011320221113 is 31112202311002.

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 9430039880569 + 10581280340544 = 3070837^2 + 3252888^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011320221113 - 2²⁵ = 20011286666681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011320221173) 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, 769666162338 + ... + 769666162363.

It is an arithmetic number, because the mean of its divisors is an integer number (5387663136457).

Almost surely, 2^{20011320221113} is an apocalyptic number.

It is an amenable number.

20011320221113 is a deficient number, since it is larger than the sum of its proper divisors (1539332324715).

20011320221113 is a wasteful number, since it uses less digits than its factorization.

20011320221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539332324714.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20011320221113 its reverse (31112202311002), we get a palindrome (51123522532115).

The spelling of 20011320221113 in words is "twenty trillion, eleven billion, three hundred twenty million, two hundred twenty-one thousand, one hundred thirteen".