2121201110120 has 32 divisors (see below), whose sum is σ = 4814938813320. Its totient is φ = 840971765760.

The previous prime is 2121201110117. The next prime is 2121201110141. The reversal of 2121201110120 is 210111021212.

It can be written as a sum of positive squares in 4 ways, for example, as 732089006884 + 1389112103236 = 855622^2 + 1178606^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2121201110095 and 2121201110104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234641621 + ... + 234650660.

Almost surely, 2^{2121201110120} is an apocalyptic number.

2121201110120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121201110120 is an abundant number, since it is smaller than the sum of its proper divisors (2693737703200).

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

2121201110120 is a wasteful number, since it uses less digits than its factorization.

2121201110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469292405 (or 469292401 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2121201110120 its reverse (210111021212), we get a palindrome (2331312131332).

The spelling of 2121201110120 in words is "two trillion, one hundred twenty-one billion, two hundred one million, one hundred ten thousand, one hundred twenty".