21320203111 has 8 divisors (see below), whose sum is σ = 22078869120. Its totient is φ = 20573484792.

The previous prime is 21320203109. The next prime is 21320203123. The reversal of 21320203111 is 11130202312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21320203111 - 2¹ = 21320203109 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 (21320203141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2983291 + ... + 2990428.

It is an arithmetic number, because the mean of its divisors is an integer number (2759858640).

Almost surely, 2^21320203111 is an apocalyptic number.

21320203111 is a deficient number, since it is larger than the sum of its proper divisors (758666009).

21320203111 is an equidigital number, since it uses as much as digits as its factorization.

21320203111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5973845.

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

Adding to 21320203111 its reverse (11130202312), we get a palindrome (32450405423).

The spelling of 21320203111 in words is "twenty-one billion, three hundred twenty million, two hundred three thousand, one hundred eleven".