20012112424243 has 4 divisors (see below), whose sum is σ = 21189295508040. Its totient is φ = 18834929340448.

The previous prime is 20012112424237. The next prime is 20012112424261. The reversal of 20012112424243 is 34242421121002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20012112424243 - 2⁹ = 20012112423731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012112424043) 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, 588591541873 + ... + 588591541906.

It is an arithmetic number, because the mean of its divisors is an integer number (5297323877010).

Almost surely, 2^{20012112424243} is an apocalyptic number.

20012112424243 is a deficient number, since it is larger than the sum of its proper divisors (1177183083797).

20012112424243 is a wasteful number, since it uses less digits than its factorization.

20012112424243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177183083796.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 20012112424243 its reverse (34242421121002), we get a palindrome (54254533545245).

The spelling of 20012112424243 in words is "twenty trillion, twelve billion, one hundred twelve million, four hundred twenty-four thousand, two hundred forty-three".