244021213423 has 4 divisors (see below), whose sum is σ = 262792076008. Its totient is φ = 225250350840.

The previous prime is 244021213399. The next prime is 244021213427. The reversal of 244021213423 is 324312120442.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244021213423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 244021213391 and 244021213400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244021213427) 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, 9385431273 + ... + 9385431298.

It is an arithmetic number, because the mean of its divisors is an integer number (65698019002).

Almost surely, 2^244021213423 is an apocalyptic number.

244021213423 is a deficient number, since it is larger than the sum of its proper divisors (18770862585).

244021213423 is a wasteful number, since it uses less digits than its factorization.

244021213423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18770862584.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 244021213423 its reverse (324312120442), we get a palindrome (568333333865).

The spelling of 244021213423 in words is "two hundred forty-four billion, twenty-one million, two hundred thirteen thousand, four hundred twenty-three".