21230333111 has 8 divisors (see below), whose sum is σ = 23395144080. Its totient is φ = 19141480512.

The previous prime is 21230333099. The next prime is 21230333143. The reversal of 21230333111 is 11133303212.

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 21230333111 - 2²² = 21226138807 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 (21230333161) 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, 18989006 + ... + 18990123.

It is an arithmetic number, because the mean of its divisors is an integer number (2924393010).

Almost surely, 2^21230333111 is an apocalyptic number.

21230333111 is a deficient number, since it is larger than the sum of its proper divisors (2164810969).

21230333111 is a wasteful number, since it uses less digits than its factorization.

21230333111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37979185.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21230333111 its reverse (11133303212), we get a palindrome (32363636323).

The spelling of 21230333111 in words is "twenty-one billion, two hundred thirty million, three hundred thirty-three thousand, one hundred eleven".