20430112121121 has 4 divisors (see below), whose sum is σ = 27240149494832. Its totient is φ = 13620074747412.

The previous prime is 20430112121099. The next prime is 20430112121123. The reversal of 20430112121121 is 12112121103402.

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 20430112121121 - 2¹³ = 20430112112929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430112121123) 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, 3405018686851 + ... + 3405018686856.

It is an arithmetic number, because the mean of its divisors is an integer number (6810037373708).

Almost surely, 2^{20430112121121} is an apocalyptic number.

It is an amenable number.

20430112121121 is a deficient number, since it is larger than the sum of its proper divisors (6810037373711).

20430112121121 is an equidigital number, since it uses as much as digits as its factorization.

20430112121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810037373710.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 20430112121121 its reverse (12112121103402), we get a palindrome (32542233224523).

The spelling of 20430112121121 in words is "twenty trillion, four hundred thirty billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-one".