2120211021 has 8 divisors (see below), whose sum is σ = 2827242880. Its totient is φ = 1413326592.

The previous prime is 2120211011. The next prime is 2120211043. The reversal of 2120211021 is 1201120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2120211021 - 2⁹ = 2120210509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120210988 and 2120211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120211011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2796 + ... + 65178.

It is an arithmetic number, because the mean of its divisors is an integer number (353405360).

Almost surely, 2^2120211021 is an apocalyptic number.

It is an amenable number.

2120211021 is a deficient number, since it is larger than the sum of its proper divisors (707031859).

2120211021 is a wasteful number, since it uses less digits than its factorization.

2120211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73715.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2120211021 is about 46045.7492174902. The cubic root of 2120211021 is about 1284.6742796092.

Adding to 2120211021 its reverse (1201120212), we get a palindrome (3321331233).

It can be divided in two parts, 21202 and 11021, that added together give a palindrome (32223).

The spelling of 2120211021 in words is "two billion, one hundred twenty million, two hundred eleven thousand, twenty-one".