401334021 has 20 divisors (see below), whose sum is σ = 654027264. Its totient is φ = 243232200.

The previous prime is 401334001. The next prime is 401334047. The reversal of 401334021 is 120433104.

It is not a de Polignac number, because 401334021 - 2¹³ = 401325829 is a prime.

It is a super-2 number, since 2×401334021² = 322137992824056882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401333985 and 401334003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401334001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 224325 + ... + 226106.

Almost surely, 2^401334021 is an apocalyptic number.

It is an amenable number.

401334021 is a deficient number, since it is larger than the sum of its proper divisors (252693243).

401334021 is a wasteful number, since it uses less digits than its factorization.

401334021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450454 (or 450445 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 401334021 is about 20033.3227648336. The cubic root of 401334021 is about 737.6244867328.

Adding to 401334021 its reverse (120433104), we get a palindrome (521767125).

The spelling of 401334021 in words is "four hundred one million, three hundred thirty-four thousand, twenty-one".