424324213021 has 4 divisors (see below), whose sum is σ = 442773091872. Its totient is φ = 405875334172.

The previous prime is 424324212989. The next prime is 424324213039. The reversal of 424324213021 is 120312423424.

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 not a de Polignac number, because 424324213021 - 2⁵ = 424324212989 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 (424324213421) 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, 9224439391 + ... + 9224439436.

It is an arithmetic number, because the mean of its divisors is an integer number (110693272968).

Almost surely, 2^424324213021 is an apocalyptic number.

It is an amenable number.

424324213021 is a deficient number, since it is larger than the sum of its proper divisors (18448878851).

424324213021 is a wasteful number, since it uses less digits than its factorization.

424324213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18448878850.

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

Adding to 424324213021 its reverse (120312423424), we get a palindrome (544636636445).

The spelling of 424324213021 in words is "four hundred twenty-four billion, three hundred twenty-four million, two hundred thirteen thousand, twenty-one".