12231220111 has 8 divisors (see below), whose sum is σ = 13345370064. Its totient is φ = 11117440320.

The previous prime is 12231220103. The next prime is 12231220139. The reversal of 12231220111 is 11102213221.

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 12231220111 - 2³ = 12231220103 is a prime.

It is a super-4 number, since 4×12231220111⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231220171) 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, 21040 + ... + 157813.

It is an arithmetic number, because the mean of its divisors is an integer number (1668171258).

Almost surely, 2^12231220111 is an apocalyptic number.

12231220111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12231220111 is a deficient number, since it is larger than the sum of its proper divisors (1114149953).

12231220111 is a wasteful number, since it uses less digits than its factorization.

12231220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185081.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12231220111 its reverse (11102213221), we get a palindrome (23333433332).

The spelling of 12231220111 in words is "twelve billion, two hundred thirty-one million, two hundred twenty thousand, one hundred eleven".