2121102221020 has 12 divisors (see below), whose sum is σ = 4454314664184. Its totient is φ = 848440888400.

The previous prime is 2121102221009. The next prime is 2121102221053. The reversal of 2121102221020 is 201222011212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2121102220985 and 2121102221003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53027555506 + ... + 53027555545.

It is an arithmetic number, because the mean of its divisors is an integer number (371192888682).

Almost surely, 2^{2121102221020} is an apocalyptic number.

2121102221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121102221020 is an abundant number, since it is smaller than the sum of its proper divisors (2333212443164).

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

2121102221020 is a wasteful number, since it uses less digits than its factorization.

2121102221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106055111060 (or 106055111058 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121102221020 its reverse (201222011212), we get a palindrome (2322324232232).

The spelling of 2121102221020 in words is "two trillion, one hundred twenty-one billion, one hundred two million, two hundred twenty-one thousand, twenty".