120111820 has 12 divisors (see below), whose sum is σ = 252234864. Its totient is φ = 48044720.

The previous prime is 120111811. The next prime is 120111821. The reversal of 120111820 is 28111021.

It is a junction number, because it is equal to n+sod(n) for n = 120111794 and 120111803.

It is not an unprimeable number, because it can be changed into a prime (120111821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3002776 + ... + 3002815.

It is an arithmetic number, because the mean of its divisors is an integer number (21019572).

Almost surely, 2^120111820 is an apocalyptic number.

120111820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120111820 is an abundant number, since it is smaller than the sum of its proper divisors (132123044).

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

120111820 is a wasteful number, since it uses less digits than its factorization.

120111820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6005600 (or 6005598 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 120111820 is about 10959.5538230350. The cubic root of 120111820 is about 493.3955738776.

Adding to 120111820 its reverse (28111021), we get a palindrome (148222841).

It can be divided in two parts, 12011 and 1820, that added together give a palindrome (13831).

The spelling of 120111820 in words is "one hundred twenty million, one hundred eleven thousand, eight hundred twenty".