120210421 has 2 divisors, whose sum is σ = 120210422. Its totient is φ = 120210420.

The previous prime is 120210367. The next prime is 120210437. The reversal of 120210421 is 124012021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114383025 + 5827396 = 10695^2 + 2414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120210421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120210491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60105210 + 60105211.

It is an arithmetic number, because the mean of its divisors is an integer number (60105211).

Almost surely, 2^120210421 is an apocalyptic number.

It is an amenable number.

120210421 is a deficient number, since it is larger than the sum of its proper divisors (1).

120210421 is an equidigital number, since it uses as much as digits as its factorization.

120210421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 120210421 is about 10964.0513041485. The cubic root of 120210421 is about 493.5305480786.

Adding to 120210421 its reverse (124012021), we get a palindrome (244222442).

The spelling of 120210421 in words is "one hundred twenty million, two hundred ten thousand, four hundred twenty-one".