20410121 has 4 divisors (see below), whose sum is σ = 21068544. Its totient is φ = 19751700.

The previous prime is 20410111. The next prime is 20410129. The reversal of 20410121 is 12101402.

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 20410121 - 2⁶ = 20410057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20410129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329165 + ... + 329226.

It is an arithmetic number, because the mean of its divisors is an integer number (5267136).

Almost surely, 2^20410121 is an apocalyptic number.

It is an amenable number.

20410121 is a deficient number, since it is larger than the sum of its proper divisors (658423).

20410121 is an equidigital number, since it uses as much as digits as its factorization.

20410121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658422.

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

The square root of 20410121 is about 4517.7561908540. The cubic root of 20410121 is about 273.2846213345.

Adding to 20410121 its reverse (12101402), we get a palindrome (32511523).

The spelling of 20410121 in words is "twenty million, four hundred ten thousand, one hundred twenty-one".