2120222021 has 2 divisors, whose sum is σ = 2120222022. Its totient is φ = 2120222020.

The previous prime is 2120222009. The next prime is 2120222033. The reversal of 2120222021 is 1202220212.

It is a balanced prime because it is at equal distance from previous prime (2120222009) and next prime (2120222033).

It can be written as a sum of positive squares in only one way, i.e., 1284433921 + 835788100 = 35839^2 + 28910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120222021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120221987 and 2120222005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120222921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060111010 + 1060111011.

It is an arithmetic number, because the mean of its divisors is an integer number (1060111011).

Almost surely, 2^2120222021 is an apocalyptic number.

It is an amenable number.

2120222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120222021 is an equidigital number, since it uses as much as digits as its factorization.

2120222021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2120222021 is about 46045.8686637574. The cubic root of 2120222021 is about 1284.6765013051.

Adding to 2120222021 its reverse (1202220212), we get a palindrome (3322442233).

It can be divided in two parts, 2 and 120222021, that multiplied together give a palindrome (240444042).

The spelling of 2120222021 in words is "two billion, one hundred twenty million, two hundred twenty-two thousand, twenty-one".