4211122021 has 2 divisors, whose sum is σ = 4211122022. Its totient is φ = 4211122020.

The previous prime is 4211122009. The next prime is 4211122031. The reversal of 4211122021 is 1202211124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3634401796 + 576720225 = 60286^2 + 24015^2 .

It is a cyclic number.

It is not a de Polignac number, because 4211122021 - 2³¹ = 2063638373 is a prime.

It is a super-2 number, since 2×4211122021² = 35467097351502248882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4211121986 and 4211122004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4211122031) 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 as a sum of consecutive naturals, namely, 2105561010 + 2105561011.

It is an arithmetic number, because the mean of its divisors is an integer number (2105561011).

Almost surely, 2^4211122021 is an apocalyptic number.

It is an amenable number.

4211122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4211122021 is an equidigital number, since it uses as much as digits as its factorization.

4211122021 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 16.

The square root of 4211122021 is about 64893.1585068873. The cubic root of 4211122021 is about 1614.8515643465.

Adding to 4211122021 its reverse (1202211124), we get a palindrome (5413333145).

The spelling of 4211122021 in words is "four billion, two hundred eleven million, one hundred twenty-two thousand, twenty-one".