400422242421 has 16 divisors (see below), whose sum is σ = 596323998720. Its totient is φ = 265550523840.

The previous prime is 400422242377. The next prime is 400422242431. The reversal of 400422242421 is 124242224004.

It is not a de Polignac number, because 400422242421 - 2³⁰ = 399348500597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400422242431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38818020 + ... + 38828333.

It is an arithmetic number, because the mean of its divisors is an integer number (37270249920).

Almost surely, 2^400422242421 is an apocalyptic number.

It is an amenable number.

400422242421 is a deficient number, since it is larger than the sum of its proper divisors (195901756299).

400422242421 is a wasteful number, since it uses less digits than its factorization.

400422242421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77646553 (or 77646547 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 400422242421 its reverse (124242224004), we get a palindrome (524664466425).

The spelling of 400422242421 in words is "four hundred billion, four hundred twenty-two million, two hundred forty-two thousand, four hundred twenty-one".