401243421121 has 4 divisors (see below), whose sum is σ = 401516191744. Its totient is φ = 400970650500.

The previous prime is 401243421097. The next prime is 401243421127. The reversal of 401243421121 is 121124342104.

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 401243421121 - 2⁷ = 401243420993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401243421127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136383105 + ... + 136386046.

It is an arithmetic number, because the mean of its divisors is an integer number (100379047936).

Almost surely, 2^401243421121 is an apocalyptic number.

It is an amenable number.

401243421121 is a deficient number, since it is larger than the sum of its proper divisors (272770623).

401243421121 is a wasteful number, since it uses less digits than its factorization.

401243421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272770622.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 401243421121 its reverse (121124342104), we get a palindrome (522367763225).

The spelling of 401243421121 in words is "four hundred one billion, two hundred forty-three million, four hundred twenty-one thousand, one hundred twenty-one".