12331422012 has 192 divisors, whose sum is σ = 36551208960. Its totient is φ = 3148637184.

The previous prime is 12331422001. The next prime is 12331422023. The reversal of 12331422012 is 21022413321.

It is an interprime number because it is at equal distance from previous prime (12331422001) and next prime (12331422023).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12331422012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9655918 + ... + 9657194.

It is an arithmetic number, because the mean of its divisors is an integer number (190370880).

Almost surely, 2^12331422012 is an apocalyptic number.

12331422012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12331422012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18275604480).

12331422012 is an abundant number, since it is smaller than the sum of its proper divisors (24219786948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12331422012 is a wasteful number, since it uses less digits than its factorization.

12331422012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12331422012 its reverse (21022413321), we get a palindrome (33353835333).

The spelling of 12331422012 in words is "twelve billion, three hundred thirty-one million, four hundred twenty-two thousand, twelve".