31203320120000 has 280 divisors, whose sum is σ = 88817264177664. Its totient is φ = 10651130496000.

The previous prime is 31203320119999. The next prime is 31203320120003. The reversal of 31203320120000 is 2102330213.

It is a tau number, because it is divible by the number of its divisors (280).

It is a super-2 number, since 2×31203320120000² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31203320120003) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63314537 + ... + 63805463.

Almost surely, 2^{31203320120000} 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 31203320120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44408632088832).

31203320120000 is an abundant number, since it is smaller than the sum of its proper divisors (57613944057664).

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

31203320120000 is an equidigital number, since it uses as much as digits as its factorization.

31203320120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491193 (or 491168 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31203320120000 its reverse (2102330213), we get a palindrome (31205422450213).

The spelling of 31203320120000 in words is "thirty-one trillion, two hundred three billion, three hundred twenty million, one hundred twenty thousand".