23212311111 has 12 divisors (see below), whose sum is σ = 36576975240. Its totient is φ = 14068067280.

The previous prime is 23212311107. The next prime is 23212311113. The reversal of 23212311111 is 11111321232.

23212311111 is a `hidden beast` number, since 2 + 321 + 231 + 1 + 111 = 666.

It is not a de Polignac number, because 23212311111 - 2² = 23212311107 is a prime.

It is a super-2 number, since 2×23212311111² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23212311113) 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 11 ways as a sum of consecutive naturals, for example, 117233796 + ... + 117233993.

It is an arithmetic number, because the mean of its divisors is an integer number (3048081270).

Almost surely, 2^23212311111 is an apocalyptic number.

23212311111 is a deficient number, since it is larger than the sum of its proper divisors (13364664129).

23212311111 is a wasteful number, since it uses less digits than its factorization.

23212311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234467806 (or 234467803 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 23212311111 its reverse (11111321232), we get a palindrome (34323632343).

The spelling of 23212311111 in words is "twenty-three billion, two hundred twelve million, three hundred eleven thousand, one hundred eleven".