12311212032 has 728 divisors, whose sum is σ = 45838146560. Its totient is φ = 3224862720.

The previous prime is 12311212009. The next prime is 12311212091. The reversal of 12311212032 is 23021211321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12311211996 and 12311212014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 397135857 + ... + 397135887.

Almost surely, 2^12311212032 is an apocalyptic number.

12311212032 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 12311212032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22919073280).

12311212032 is an abundant number, since it is smaller than the sum of its proper divisors (33526934528).

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

12311212032 is an frugal number, since it uses more digits than its factorization.

12311212032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 62 counting only the distinct ones).

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

Adding to 12311212032 its reverse (23021211321), we get a palindrome (35332423353).

The spelling of 12311212032 in words is "twelve billion, three hundred eleven million, two hundred twelve thousand, thirty-two".