12311312212320 has 288 divisors, whose sum is σ = 43048713224160. Its totient is φ = 2955009024000.

The previous prime is 12311312212301. The next prime is 12311312212321. The reversal of 12311312212320 is 2321221311321.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311312212321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4816716 + ... + 6915444.

It is an arithmetic number, because the mean of its divisors is an integer number (149474698695).

Almost surely, 2^{12311312212320} is an apocalyptic number.

12311312212320 is a gapful number since it is divisible by the number (10) 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 12311312212320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21524356612080).

12311312212320 is an abundant number, since it is smaller than the sum of its proper divisors (30737401011840).

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

12311312212320 is a wasteful number, since it uses less digits than its factorization.

12311312212320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098870 (or 2098851 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 12311312212320 its reverse (2321221311321), we get a palindrome (14632533523641).

Subtracting from 12311312212320 its reverse (2321221311321), we obtain a palindrome (9990090900999).

The spelling of 12311312212320 in words is "twelve trillion, three hundred eleven billion, three hundred twelve million, two hundred twelve thousand, three hundred twenty".