21120230111 has 8 divisors (see below), whose sum is σ = 21425606400. Its totient is φ = 20816883360.

The previous prime is 21120230101. The next prime is 21120230189. The reversal of 21120230111 is 11103202112.

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 21120230111 - 2¹⁰ = 21120229087 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 (21120230101) 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, 486416 + ... + 528053.

It is an arithmetic number, because the mean of its divisors is an integer number (2678200800).

Almost surely, 2^21120230111 is an apocalyptic number.

21120230111 is a deficient number, since it is larger than the sum of its proper divisors (305376289).

21120230111 is a wasteful number, since it uses less digits than its factorization.

21120230111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014769.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21120230111 its reverse (11103202112), we get a palindrome (32223432223).

The spelling of 21120230111 in words is "twenty-one billion, one hundred twenty million, two hundred thirty thousand, one hundred eleven".