21022320111 has 8 divisors (see below), whose sum is σ = 30185895600. Its totient is φ = 12936812352.

The previous prime is 21022320079. The next prime is 21022320133. The reversal of 21022320111 is 11102322012.

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

It is not a de Polignac number, because 21022320111 - 2⁵ = 21022320079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022320511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269516886 + ... + 269516963.

It is an arithmetic number, because the mean of its divisors is an integer number (3773236950).

Almost surely, 2^21022320111 is an apocalyptic number.

21022320111 is a deficient number, since it is larger than the sum of its proper divisors (9163575489).

21022320111 is a wasteful number, since it uses less digits than its factorization.

21022320111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539033865.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21022320111 its reverse (11102322012), we get a palindrome (32124642123).

The spelling of 21022320111 in words is "twenty-one billion, twenty-two million, three hundred twenty thousand, one hundred eleven".