120311121500 has 96 divisors (see below), whose sum is σ = 264766320000. Its totient is φ = 47758233600.

The previous prime is 120311121499. The next prime is 120311121503. The reversal of 120311121500 is 5121113021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120311121503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44674154 + ... + 44676846.

It is an arithmetic number, because the mean of its divisors is an integer number (2757982500).

Almost surely, 2^120311121500 is an apocalyptic number.

120311121500 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 120311121500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132383160000).

120311121500 is an abundant number, since it is smaller than the sum of its proper divisors (144455198500).

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

120311121500 is a wasteful number, since it uses less digits than its factorization.

120311121500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360 (or 3348 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 120311121500 its reverse (5121113021), we get a palindrome (125432234521).

The spelling of 120311121500 in words is "one hundred twenty billion, three hundred eleven million, one hundred twenty-one thousand, five hundred".