400121164313 has 4 divisors (see below), whose sum is σ = 430899715428. Its totient is φ = 369342613200.

The previous prime is 400121164301. The next prime is 400121164321. The reversal of 400121164313 is 313461121004.

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 54268963849 + 345852200464 = 232957^2 + 588092^2 .

It is a cyclic number.

It is not a de Polignac number, because 400121164313 - 2⁴ = 400121164297 is a prime.

It is a super-2 number, since 2×400121164313² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400121169313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15389275538 + ... + 15389275563.

It is an arithmetic number, because the mean of its divisors is an integer number (107724928857).

Almost surely, 2^400121164313 is an apocalyptic number.

It is an amenable number.

400121164313 is a deficient number, since it is larger than the sum of its proper divisors (30778551115).

400121164313 is a wasteful number, since it uses less digits than its factorization.

400121164313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30778551114.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 400121164313 its reverse (313461121004), we get a palindrome (713582285317).

The spelling of 400121164313 in words is "four hundred billion, one hundred twenty-one million, one hundred sixty-four thousand, three hundred thirteen".