23212111 has 8 divisors (see below), whose sum is σ = 25038720. Its totient is φ = 21391392.

The previous prime is 23212099. The next prime is 23212139. The reversal of 23212111 is 11121232.

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 23212111 - 2¹⁷ = 23081039 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23212091 and 23212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23212711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10185 + ... + 12253.

It is an arithmetic number, because the mean of its divisors is an integer number (3129840).

Almost surely, 2^23212111 is an apocalyptic number.

23212111 is a deficient number, since it is larger than the sum of its proper divisors (1826609).

23212111 is a wasteful number, since it uses less digits than its factorization.

23212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945.

The product of its digits is 24, while the sum is 13.

The square root of 23212111 is about 4817.8948722445. The cubic root of 23212111 is about 285.2582495554.

Adding to 23212111 its reverse (11121232), we get a palindrome (34333343).

The spelling of 23212111 in words is "twenty-three million, two hundred twelve thousand, one hundred eleven".