400434130203121 has 32 divisors (see below), whose sum is σ = 458555651573760. Its totient is φ = 342542601523584.

The previous prime is 400434130203119. The next prime is 400434130203139. The reversal of 400434130203121 is 121302031434004.

It is a happy number.

It is not a de Polignac number, because 400434130203121 - 2¹ = 400434130203119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400434130203121.

It is not an unprimeable number, because it can be changed into a prime (400434130203521) 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 31 ways as a sum of consecutive naturals, for example, 42450343021 + ... + 42450352453.

It is an arithmetic number, because the mean of its divisors is an integer number (14329864111680).

Almost surely, 2^{400434130203121} is an apocalyptic number.

It is an amenable number.

400434130203121 is a deficient number, since it is larger than the sum of its proper divisors (58121521370639).

400434130203121 is a wasteful number, since it uses less digits than its factorization.

400434130203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15565.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 400434130203121 its reverse (121302031434004), we get a palindrome (521736161637125).

The spelling of 400434130203121 in words is "four hundred trillion, four hundred thirty-four billion, one hundred thirty million, two hundred three thousand, one hundred twenty-one".