20121244423 has 8 divisors (see below), whose sum is σ = 22996568448. Its totient is φ = 17246135544.

The previous prime is 20121244379. The next prime is 20121244433. The reversal of 20121244423 is 32444212102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121244423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121244433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317640 + ... + 375682.

It is an arithmetic number, because the mean of its divisors is an integer number (2874571056).

Almost surely, 2^20121244423 is an apocalyptic number.

20121244423 is a deficient number, since it is larger than the sum of its proper divisors (2875324025).

20121244423 is an equidigital number, since it uses as much as digits as its factorization.

20121244423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107573.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20121244423 its reverse (32444212102), we get a palindrome (52565456525).

The spelling of 20121244423 in words is "twenty billion, one hundred twenty-one million, two hundred forty-four thousand, four hundred twenty-three".