10120421 has 2 divisors, whose sum is σ = 10120422. Its totient is φ = 10120420.

The previous prime is 10120387. The next prime is 10120427. The reversal of 10120421 is 12402101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6180196 + 3940225 = 2486^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 10120421 - 2¹⁰ = 10119397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10120427) 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, 5060210 + 5060211.

It is an arithmetic number, because the mean of its divisors is an integer number (5060211).

Almost surely, 2^10120421 is an apocalyptic number.

It is an amenable number.

10120421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10120421 is an equidigital number, since it uses as much as digits as its factorization.

10120421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 10120421 is about 3181.2609135373. The cubic root of 10120421 is about 216.3048179827.

Adding to 10120421 its reverse (12402101), we get a palindrome (22522522).

The spelling of 10120421 in words is "ten million, one hundred twenty thousand, four hundred twenty-one".