1420213021 has 2 divisors, whose sum is σ = 1420213022. Its totient is φ = 1420213020.

The previous prime is 1420213009. The next prime is 1420213057. The reversal of 1420213021 is 1203120241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 863772100 + 556440921 = 29390^2 + 23589^2 .

It is a cyclic number.

It is not a de Polignac number, because 1420213021 - 2⁹ = 1420212509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1420212986 and 1420213004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1420210021) 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, 710106510 + 710106511.

It is an arithmetic number, because the mean of its divisors is an integer number (710106511).

Almost surely, 2^1420213021 is an apocalyptic number.

It is an amenable number.

1420213021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1420213021 is an equidigital number, since it uses as much as digits as its factorization.

1420213021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1420213021 is about 37685.7137520308. The cubic root of 1420213021 is about 1124.0470668880.

Adding to 1420213021 its reverse (1203120241), we get a palindrome (2623333262).

The spelling of 1420213021 in words is "one billion, four hundred twenty million, two hundred thirteen thousand, twenty-one".