120111221020 has 24 divisors (see below), whose sum is σ = 288266930784. Its totient is φ = 41180990016.

The previous prime is 120111220981. The next prime is 120111221039. The reversal of 120111221020 is 20122111021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428968507 + ... + 428968786.

It is an arithmetic number, because the mean of its divisors is an integer number (12011122116).

Almost surely, 2^120111221020 is an apocalyptic number.

120111221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120111221020 is an abundant number, since it is smaller than the sum of its proper divisors (168155709764).

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

120111221020 is a wasteful number, since it uses less digits than its factorization.

120111221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857937309 (or 857937307 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 120111221020 its reverse (20122111021), we get a palindrome (140233332041).

The spelling of 120111221020 in words is "one hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, twenty".