2120022021 has 12 divisors (see below), whose sum is σ = 3060860928. Its totient is φ = 1304628624.

The previous prime is 2120022019. The next prime is 2120022029. The reversal of 2120022021 is 1202200212.

It is not a de Polignac number, because 2120022021 - 2¹ = 2120022019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120021988 and 2120022006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120022029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2090245 + ... + 2091258.

It is an arithmetic number, because the mean of its divisors is an integer number (255071744).

Almost surely, 2^2120022021 is an apocalyptic number.

It is an amenable number.

2120022021 is a deficient number, since it is larger than the sum of its proper divisors (940838907).

2120022021 is a wasteful number, since it uses less digits than its factorization.

2120022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181532 (or 4181519 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2120022021 is about 46043.6968650433. The cubic root of 2120022021 is about 1284.6361056332.

Adding to 2120022021 its reverse (1202200212), we get a palindrome (3322222233).

The spelling of 2120022021 in words is "two billion, one hundred twenty million, twenty-two thousand, twenty-one".