12312011228 has 24 divisors (see below), whose sum is σ = 24526696320. Its totient is φ = 5353047920.

The previous prime is 12312011227. The next prime is 12312011281. The reversal of 12312011228 is 82211021321.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312011221) 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, 6081998 + ... + 6084021.

It is an arithmetic number, because the mean of its divisors is an integer number (1021945680).

Almost surely, 2^12312011228 is an apocalyptic number.

It is an amenable number.

12312011228 is a deficient number, since it is larger than the sum of its proper divisors (12214685092).

12312011228 is a wasteful number, since it uses less digits than its factorization.

12312011228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12166057 (or 12166055 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 12312011228 its reverse (82211021321), we get a palindrome (94523032549).

The spelling of 12312011228 in words is "twelve billion, three hundred twelve million, eleven thousand, two hundred twenty-eight".