31320111021120 has 336 divisors, whose sum is σ = 113524977676032. Its totient is φ = 7909798195200.

The previous prime is 31320111021113. The next prime is 31320111021203. The reversal of 31320111021120 is 2112011102313.

31320111021120 is a `hidden beast` number, since 3 + 1 + 320 + 1 + 110 + 211 + 20 = 666.

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 = 31320111021093 and 31320111021102.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4349509 + ... + 9030971.

Almost surely, 2^{31320111021120} is an apocalyptic number.

31320111021120 is a gapful number since it is divisible by the number (30) 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 31320111021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56762488838016).

31320111021120 is an abundant number, since it is smaller than the sum of its proper divisors (82204866654912).

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

31320111021120 is a wasteful number, since it uses less digits than its factorization.

31320111021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4681610 (or 4681597 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 31320111021120 its reverse (2112011102313), we get a palindrome (33432122123433).

The spelling of 31320111021120 in words is "thirty-one trillion, three hundred twenty billion, one hundred eleven million, twenty-one thousand, one hundred twenty".