402441024121 has 4 divisors (see below), whose sum is σ = 402478544500. Its totient is φ = 402403503744.

The previous prime is 402441024109. The next prime is 402441024131. The reversal of 402441024121 is 121420144204.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 307292835600 + 95148188521 = 554340^2 + 308461^2 .

It is a cyclic number.

It is not a de Polignac number, because 402441024121 - 2⁷ = 402441023993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402441024131) 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, 18744096 + ... + 18765553.

It is an arithmetic number, because the mean of its divisors is an integer number (100619636125).

Almost surely, 2^402441024121 is an apocalyptic number.

It is an amenable number.

402441024121 is a deficient number, since it is larger than the sum of its proper divisors (37520379).

402441024121 is a wasteful number, since it uses less digits than its factorization.

402441024121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37520378.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 402441024121 its reverse (121420144204), we get a palindrome (523861168325).

The spelling of 402441024121 in words is "four hundred two billion, four hundred forty-one million, twenty-four thousand, one hundred twenty-one".