31224003320000 has 140 divisors (see below), whose sum is σ = 77446903713960. Its totient is φ = 12486129408000.

The previous prime is 31224003319981. The next prime is 31224003320009. The reversal of 31224003320000 is 2330042213.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (31224003320009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 146253332 + ... + 146466668.

Almost surely, 2^{31224003320000} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31224003320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38723451856980).

31224003320000 is an abundant number, since it is smaller than the sum of its proper divisors (46222900393960).

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

31224003320000 is an equidigital number, since it uses as much as digits as its factorization.

31224003320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217028 (or 217003 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 31224003320000 its reverse (2330042213), we get a palindrome (31226333362213).

The spelling of 31224003320000 in words is "thirty-one trillion, two hundred twenty-four billion, three million, three hundred twenty thousand".