20213320111 has 4 divisors (see below), whose sum is σ = 20227175800. Its totient is φ = 20199464424.

The previous prime is 20213320103. The next prime is 20213320117. The reversal of 20213320111 is 11102331202.

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

It is a cyclic number.

It is not a de Polignac number, because 20213320111 - 2³ = 20213320103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213320117) 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, 6925656 + ... + 6928573.

It is an arithmetic number, because the mean of its divisors is an integer number (5056793950).

Almost surely, 2^20213320111 is an apocalyptic number.

20213320111 is a deficient number, since it is larger than the sum of its proper divisors (13855689).

20213320111 is a wasteful number, since it uses less digits than its factorization.

20213320111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13855688.

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

Adding to 20213320111 its reverse (11102331202), we get a palindrome (31315651313).

The spelling of 20213320111 in words is "twenty billion, two hundred thirteen million, three hundred twenty thousand, one hundred eleven".