12120111221020 has 96 divisors (see below), whose sum is σ = 29597413708800. Its totient is φ = 4122496684800.

The previous prime is 12120111221003. The next prime is 12120111221047. The reversal of 12120111221020 is 2012211102121.

12120111221020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12120111220985 and 12120111221003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18021351 + ... + 18681790.

It is an arithmetic number, because the mean of its divisors is an integer number (308306392800).

Almost surely, 2^{12120111221020} is an apocalyptic number.

12120111221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120111221020 is an abundant number, since it is smaller than the sum of its proper divisors (17477302487780).

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

12120111221020 is a wasteful number, since it uses less digits than its factorization.

12120111221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36703259 (or 36703257 counting only the distinct ones).

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

Adding to 12120111221020 its reverse (2012211102121), we get a palindrome (14132322323141).

The spelling of 12120111221020 in words is "twelve trillion, one hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, twenty".