4221020149 has 2 divisors, whose sum is σ = 4221020150. Its totient is φ = 4221020148.

The previous prime is 4221020143. The next prime is 4221020201. The reversal of 4221020149 is 9410201224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3910626225 + 310393924 = 62535^2 + 17618^2 .

It is a cyclic number.

It is not a de Polignac number, because 4221020149 - 2¹⁹ = 4220495861 is a prime.

It is a super-2 number, since 2×4221020149² = 35634022196527964402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4221020143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2110510074 + 2110510075.

It is an arithmetic number, because the mean of its divisors is an integer number (2110510075).

Almost surely, 2^4221020149 is an apocalyptic number.

It is an amenable number.

4221020149 is a deficient number, since it is larger than the sum of its proper divisors (1).

4221020149 is an equidigital number, since it uses as much as digits as its factorization.

4221020149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 4221020149 is about 64969.3785486671. The cubic root of 4221020149 is about 1616.1157959382.

The spelling of 4221020149 in words is "four billion, two hundred twenty-one million, twenty thousand, one hundred forty-nine".