20144121 has 4 divisors (see below), whose sum is σ = 26858832. Its totient is φ = 13429412.

The previous prime is 20144119. The next prime is 20144129. The reversal of 20144121 is 12144102.

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 20144121 - 2¹ = 20144119 is a prime.

It is a super-3 number, since 3×20144121³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 20144121.

It is not an unprimeable number, because it can be changed into a prime (20144129) 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, 3357351 + ... + 3357356.

It is an arithmetic number, because the mean of its divisors is an integer number (6714708).

Almost surely, 2^20144121 is an apocalyptic number.

It is an amenable number.

20144121 is a deficient number, since it is larger than the sum of its proper divisors (6714711).

20144121 is an equidigital number, since it uses as much as digits as its factorization.

20144121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714710.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 20144121 is about 4488.2202486063. The cubic root of 20144121 is about 272.0922094017.

Adding to 20144121 its reverse (12144102), we get a palindrome (32288223).

The spelling of 20144121 in words is "twenty million, one hundred forty-four thousand, one hundred twenty-one".