2120211221020 has 12 divisors (see below), whose sum is σ = 4452443564184. Its totient is φ = 848084488400.

The previous prime is 2120211220993. The next prime is 2120211221027. The reversal of 2120211221020 is 201221120212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2120211220985 and 2120211221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120211221027) 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, 53005280506 + ... + 53005280545.

It is an arithmetic number, because the mean of its divisors is an integer number (371036963682).

Almost surely, 2^{2120211221020} is an apocalyptic number.

2120211221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120211221020 is an abundant number, since it is smaller than the sum of its proper divisors (2332232343164).

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

2120211221020 is a wasteful number, since it uses less digits than its factorization.

2120211221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106010561060 (or 106010561058 counting only the distinct ones).

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

Adding to 2120211221020 its reverse (201221120212), we get a palindrome (2321432341232).

The spelling of 2120211221020 in words is "two trillion, one hundred twenty billion, two hundred eleven million, two hundred twenty-one thousand, twenty".