400120113231 has 8 divisors (see below), whose sum is σ = 592770538160. Its totient is φ = 266746742136.

The previous prime is 400120113229. The next prime is 400120113269. The reversal of 400120113231 is 132311021004.

400120113231 is a `hidden beast` number, since 400 + 1 + 20 + 1 + 13 + 231 = 666.

It is not a de Polignac number, because 400120113231 - 2¹ = 400120113229 is a prime.

It is a super-2 number, since 2×400120113231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400120113931) 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 7 ways as a sum of consecutive naturals, for example, 7409631700 + ... + 7409631753.

It is an arithmetic number, because the mean of its divisors is an integer number (74096317270).

Almost surely, 2^400120113231 is an apocalyptic number.

400120113231 is a deficient number, since it is larger than the sum of its proper divisors (192650424929).

400120113231 is a wasteful number, since it uses less digits than its factorization.

400120113231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14819263462 (or 14819263456 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 400120113231 its reverse (132311021004), we get a palindrome (532431134235).

The spelling of 400120113231 in words is "four hundred billion, one hundred twenty million, one hundred thirteen thousand, two hundred thirty-one".