401131111 has 4 divisors (see below), whose sum is σ = 406208800. Its totient is φ = 396053424.

The previous prime is 401131079. The next prime is 401131183. The reversal of 401131111 is 111131104.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 401131111 - 2⁵ = 401131079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401131091 and 401131100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401137111) 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, 2538726 + ... + 2538883.

It is an arithmetic number, because the mean of its divisors is an integer number (101552200).

Almost surely, 2^401131111 is an apocalyptic number.

401131111 is a deficient number, since it is larger than the sum of its proper divisors (5077689).

401131111 is an equidigital number, since it uses as much as digits as its factorization.

401131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5077688.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 401131111 is about 20028.2578124010. The cubic root of 401131111 is about 737.5001542085.

Adding to 401131111 its reverse (111131104), we get a palindrome (512262215).

The spelling of 401131111 in words is "four hundred one million, one hundred thirty-one thousand, one hundred eleven".