400240121005 has 8 divisors (see below), whose sum is σ = 480440009952. Its totient is φ = 320090853648.

The previous prime is 400240120967. The next prime is 400240121069. The reversal of 400240121005 is 500121042004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400240121005 - 2³¹ = 398092637357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 12637999 + ... + 12669628.

It is an arithmetic number, because the mean of its divisors is an integer number (60055001244).

Almost surely, 2^400240121005 is an apocalyptic number.

It is an amenable number.

400240121005 is a deficient number, since it is larger than the sum of its proper divisors (80199888947).

400240121005 is a wasteful number, since it uses less digits than its factorization.

400240121005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25310795.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 400240121005 its reverse (500121042004), we get a palindrome (900361163009).

The spelling of 400240121005 in words is "four hundred billion, two hundred forty million, one hundred twenty-one thousand, five".