120801820 has 24 divisors (see below), whose sum is σ = 262432800. Its totient is φ = 46654272.

The previous prime is 120801817. The next prime is 120801827. The reversal of 120801820 is 28108021.

It is a junction number, because it is equal to n+sod(n) for n = 120801791 and 120801800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120801827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103560 + ... + 104719.

It is an arithmetic number, because the mean of its divisors is an integer number (10934700).

Almost surely, 2^120801820 is an apocalyptic number.

120801820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120801820 is an abundant number, since it is smaller than the sum of its proper divisors (141630980).

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

120801820 is a wasteful number, since it uses less digits than its factorization.

120801820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208317 (or 208315 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 120801820 is about 10990.9881266427. The cubic root of 120801820 is about 494.3385649182.

Adding to 120801820 its reverse (28108021), we get a palindrome (148909841).

The spelling of 120801820 in words is "one hundred twenty million, eight hundred one thousand, eight hundred twenty".