20303221111 has 4 divisors (see below), whose sum is σ = 20303621800. Its totient is φ = 20302820424.

The previous prime is 20303221109. The next prime is 20303221129. The reversal of 20303221111 is 11112230302.

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 20303221111 - 2¹ = 20303221109 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 (20303221511) 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, 111081 + ... + 230098.

It is an arithmetic number, because the mean of its divisors is an integer number (5075905450).

Almost surely, 2^20303221111 is an apocalyptic number.

20303221111 is a deficient number, since it is larger than the sum of its proper divisors (400689).

20303221111 is an equidigital number, since it uses as much as digits as its factorization.

20303221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400688.

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

Adding to 20303221111 its reverse (11112230302), we get a palindrome (31415451413).

The spelling of 20303221111 in words is "twenty billion, three hundred three million, two hundred twenty-one thousand, one hundred eleven".