12102321231 has 96 divisors (see below), whose sum is σ = 24106188288. Its totient is φ = 5646309120.

The previous prime is 12102321221. The next prime is 12102321271. The reversal of 12102321231 is 13212320121.

12102321231 is a `hidden beast` number, since 12 + 102 + 321 + 231 = 666.

12102321231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12102321231 - 2⁷ = 12102321103 is a prime.

It is a super-2 number, since 2×12102321231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102321211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 315180 + ... + 351486.

It is an arithmetic number, because the mean of its divisors is an integer number (251106128).

Almost surely, 2^12102321231 is an apocalyptic number.

12102321231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12102321231 is a deficient number, since it is larger than the sum of its proper divisors (12003867057).

12102321231 is a wasteful number, since it uses less digits than its factorization.

12102321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36381 (or 36378 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12102321231 its reverse (13212320121), we get a palindrome (25314641352).

It can be divided in two parts, 12102 and 321231, that added together give a palindrome (333333).

The spelling of 12102321231 in words is "twelve billion, one hundred two million, three hundred twenty-one thousand, two hundred thirty-one".