20231121 has 8 divisors (see below), whose sum is σ = 27056224. Its totient is φ = 13446720.

The previous prime is 20231093. The next prime is 20231129. The reversal of 20231121 is 12113202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20231121 - 2¹⁹ = 19706833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20231097 and 20231106.

It is not an unprimeable number, because it can be changed into a prime (20231129) 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 in 7 ways as a sum of consecutive naturals, for example, 8995 + ... + 11016.

It is an arithmetic number, because the mean of its divisors is an integer number (3382028).

Almost surely, 2^20231121 is an apocalyptic number.

It is an amenable number.

20231121 is a deficient number, since it is larger than the sum of its proper divisors (6825103).

20231121 is a wasteful number, since it uses less digits than its factorization.

20231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20351.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20231121 is about 4497.9018441936. The cubic root of 20231121 is about 272.4833578479.

Adding to 20231121 its reverse (12113202), we get a palindrome (32344323).

The spelling of 20231121 in words is "twenty million, two hundred thirty-one thousand, one hundred twenty-one".