20242112021 has 4 divisors (see below), whose sum is σ = 21122203872. Its totient is φ = 19362020172.

The previous prime is 20242111993. The next prime is 20242112039. The reversal of 20242112021 is 12021124202.

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 20242112021 - 2²⁶ = 20175003157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20242112321) 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, 440045891 + ... + 440045936.

It is an arithmetic number, because the mean of its divisors is an integer number (5280550968).

Almost surely, 2^20242112021 is an apocalyptic number.

It is an amenable number.

20242112021 is a deficient number, since it is larger than the sum of its proper divisors (880091851).

20242112021 is an equidigital number, since it uses as much as digits as its factorization.

20242112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880091850.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20242112021 its reverse (12021124202), we get a palindrome (32263236223).

The spelling of 20242112021 in words is "twenty billion, two hundred forty-two million, one hundred twelve thousand, twenty-one".