401311123 has 4 divisors (see below), whose sum is σ = 401382808. Its totient is φ = 401239440.

The previous prime is 401311121. The next prime is 401311133. The reversal of 401311123 is 321113104.

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 401311123 - 2¹ = 401311121 is a prime.

It is a super-2 number, since 2×401311123² = 322101234887042258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401311097 and 401311106.

It is not an unprimeable number, because it can be changed into a prime (401311121) 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, 26661 + ... + 38902.

It is an arithmetic number, because the mean of its divisors is an integer number (100345702).

Almost surely, 2^401311123 is an apocalyptic number.

401311123 is a deficient number, since it is larger than the sum of its proper divisors (71685).

401311123 is an equidigital number, since it uses as much as digits as its factorization.

401311123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71684.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 401311123 is about 20032.7512588761. The cubic root of 401311123 is about 737.6104581466.

Adding to 401311123 its reverse (321113104), we get a palindrome (722424227).

The spelling of 401311123 in words is "four hundred one million, three hundred eleven thousand, one hundred twenty-three".