20112240022421 has 4 divisors (see below), whose sum is σ = 20112283542912. Its totient is φ = 20112196501932.

The previous prime is 20112240022409. The next prime is 20112240022423. The reversal of 20112240022421 is 12422004221102.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112240022421 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 (20112240022423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21059525 + ... + 21993818.

It is an arithmetic number, because the mean of its divisors is an integer number (5028070885728).

Almost surely, 2^{20112240022421} is an apocalyptic number.

It is an amenable number.

20112240022421 is a deficient number, since it is larger than the sum of its proper divisors (43520491).

20112240022421 is an equidigital number, since it uses as much as digits as its factorization.

20112240022421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43520490.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 20112240022421 its reverse (12422004221102), we get a palindrome (32534244243523).

The spelling of 20112240022421 in words is "twenty trillion, one hundred twelve billion, two hundred forty million, twenty-two thousand, four hundred twenty-one".