401332111 has 2 divisors, whose sum is σ = 401332112. Its totient is φ = 401332110.

The previous prime is 401332103. The next prime is 401332121. The reversal of 401332111 is 111233104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401332111 - 2³ = 401332103 is a prime.

It is a super-2 number, since 2×401332111² = 322134926639432642, which contains 22 as substring.

It is equal to p_21403312 and since 401332111 and 21403312 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401332121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200666055 + 200666056.

It is an arithmetic number, because the mean of its divisors is an integer number (200666056).

Almost surely, 2^401332111 is an apocalyptic number.

401332111 is a deficient number, since it is larger than the sum of its proper divisors (1).

401332111 is an equidigital number, since it uses as much as digits as its factorization.

401332111 is an odious number, because the sum of its binary digits is odd.

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

The square root of 401332111 is about 20033.2750942026. The cubic root of 401332111 is about 737.6233165812.

Adding to 401332111 its reverse (111233104), we get a palindrome (512565215).

The spelling of 401332111 in words is "four hundred one million, three hundred thirty-two thousand, one hundred eleven".