120311100 has 324 divisors, whose sum is σ = 470813616. Its totient is φ = 25159680.

The previous prime is 120311063. The next prime is 120311101. The reversal of 120311100 is 1113021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120311101) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 1064644 + ... + 1064756.

Almost surely, 2^120311100 is an apocalyptic number.

120311100 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 120311100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235406808).

120311100 is an abundant number, since it is smaller than the sum of its proper divisors (350502516).

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

120311100 is a wasteful number, since it uses less digits than its factorization.

120311100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 120311100 is about 10968.6416661317. The cubic root of 120311100 is about 493.6682907037.

Adding to 120311100 its reverse (1113021), we get a palindrome (121424121).

It can be divided in two parts, 12031 and 1100, that added together give a palindrome (13131).

The spelling of 120311100 in words is "one hundred twenty million, three hundred eleven thousand, one hundred".