20033121 has 4 divisors (see below), whose sum is σ = 26710832. Its totient is φ = 13355412.

The previous prime is 20033093. The next prime is 20033137. The reversal of 20033121 is 12133002.

It is a happy number.

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 not a de Polignac number, because 20033121 - 2¹⁰ = 20032097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20033097 and 20033106.

It is not an unprimeable number, because it can be changed into a prime (20034121) 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, 3338851 + ... + 3338856.

It is an arithmetic number, because the mean of its divisors is an integer number (6677708).

Almost surely, 2^20033121 is an apocalyptic number.

It is an amenable number.

20033121 is a deficient number, since it is larger than the sum of its proper divisors (6677711).

20033121 is an equidigital number, since it uses as much as digits as its factorization.

20033121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6677710.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20033121 is about 4475.8374635369. The cubic root of 20033121 is about 271.5915193976.

Adding to 20033121 its reverse (12133002), we get a palindrome (32166123).

The spelling of 20033121 in words is "twenty million, thirty-three thousand, one hundred twenty-one".