120100420 has 24 divisors (see below), whose sum is σ = 275139648. Its totient is φ = 43672800.

The previous prime is 120100391. The next prime is 120100423. The reversal of 120100420 is 24001021.

It is a super-2 number, since 2×120100420² = 28848221768352800, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 120100397 and 120100406.

It is not an unprimeable number, because it can be changed into a prime (120100423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272736 + ... + 273175.

It is an arithmetic number, because the mean of its divisors is an integer number (11464152).

Almost surely, 2^120100420 is an apocalyptic number.

120100420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120100420 is an abundant number, since it is smaller than the sum of its proper divisors (155039228).

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

120100420 is a wasteful number, since it uses less digits than its factorization.

120100420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545931 (or 545929 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 120100420 is about 10959.0337165281. The cubic root of 120100420 is about 493.3799637361.

Adding to 120100420 its reverse (24001021), we get a palindrome (144101441).

The spelling of 120100420 in words is "one hundred twenty million, one hundred thousand, four hundred twenty".