401121231 has 16 divisors (see below), whose sum is σ = 613618944. Its totient is φ = 228317184.

The previous prime is 401121229. The next prime is 401121247. The reversal of 401121231 is 132121104.

It is not a de Polignac number, because 401121231 - 2¹ = 401121229 is a prime.

It is a super-2 number, since 2×401121231² = 321796483917910722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401121231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401121251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31765 + ... + 42558.

It is an arithmetic number, because the mean of its divisors is an integer number (38351184).

Almost surely, 2^401121231 is an apocalyptic number.

401121231 is a deficient number, since it is larger than the sum of its proper divisors (212497713).

401121231 is a wasteful number, since it uses less digits than its factorization.

401121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74590.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 401121231 is about 20028.0111593738. The cubic root of 401121231 is about 737.4940991963.

Adding to 401121231 its reverse (132121104), we get a palindrome (533242335).

The spelling of 401121231 in words is "four hundred one million, one hundred twenty-one thousand, two hundred thirty-one".