120123100 has 36 divisors (see below), whose sum is σ = 262264464. Its totient is φ = 47754880.

The previous prime is 120123079. The next prime is 120123103. The reversal of 120123100 is 1321021.

It is a super-2 number, since 2×120123100² = 28859118307220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120123103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13104 + ... + 20296.

It is an arithmetic number, because the mean of its divisors is an integer number (7285124).

Almost surely, 2^120123100 is an apocalyptic number.

120123100 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 120123100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131132232).

120123100 is an abundant number, since it is smaller than the sum of its proper divisors (142141364).

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

120123100 is a wasteful number, since it uses less digits than its factorization.

120123100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7374 (or 7367 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 120123100 is about 10960.0684304433. The cubic root of 120123100 is about 493.4110187296.

Adding to 120123100 its reverse (1321021), we get a palindrome (121444121).

The spelling of 120123100 in words is "one hundred twenty million, one hundred twenty-three thousand, one hundred".