400023344422421 has 4 divisors (see below), whose sum is σ = 421077204655200. Its totient is φ = 378969484189644.

The previous prime is 400023344422409. The next prime is 400023344422483. The reversal of 400023344422421 is 124224443320004.

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 400023344422421 - 2²⁶ = 400023277313557 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 (400023344122421) 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, 10526930116361 + ... + 10526930116398.

It is an arithmetic number, because the mean of its divisors is an integer number (105269301163800).

Almost surely, 2^{400023344422421} is an apocalyptic number.

It is an amenable number.

400023344422421 is a deficient number, since it is larger than the sum of its proper divisors (21053860232779).

400023344422421 is a wasteful number, since it uses less digits than its factorization.

400023344422421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21053860232778.

The product of its (nonzero) digits is 147456, while the sum is 35.

Adding to 400023344422421 its reverse (124224443320004), we get a palindrome (524247787742425).

The spelling of 400023344422421 in words is "four hundred trillion, twenty-three billion, three hundred forty-four million, four hundred twenty-two thousand, four hundred twenty-one".