10420121 has 4 divisors (see below), whose sum is σ = 10467072. Its totient is φ = 10373172.

The previous prime is 10420103. The next prime is 10420129. The reversal of 10420121 is 12102401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10420121 - 2¹⁴ = 10403737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10420129) 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 in 3 ways as a sum of consecutive naturals, for example, 23141 + ... + 23586.

It is an arithmetic number, because the mean of its divisors is an integer number (2616768).

Almost surely, 2^10420121 is an apocalyptic number.

It is an amenable number.

10420121 is a deficient number, since it is larger than the sum of its proper divisors (46951).

10420121 is an equidigital number, since it uses as much as digits as its factorization.

10420121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46950.

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

The square root of 10420121 is about 3228.0212205003. The cubic root of 10420121 is about 218.4192546210.

Adding to 10420121 its reverse (12102401), we get a palindrome (22522522).

The spelling of 10420121 in words is "ten million, four hundred twenty thousand, one hundred twenty-one".