401440101321 has 12 divisors (see below), whose sum is σ = 622641790032. Its totient is φ = 229394343528.

The previous prime is 401440101317. The next prime is 401440101331. The reversal of 401440101321 is 123101044104.

It is not a de Polignac number, because 401440101321 - 2² = 401440101317 is a prime.

It is a super-2 number, since 2×401440101321² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (401440101331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1365442375 + ... + 1365442668.

It is an arithmetic number, because the mean of its divisors is an integer number (51886815836).

Almost surely, 2^401440101321 is an apocalyptic number.

It is an amenable number.

401440101321 is a deficient number, since it is larger than the sum of its proper divisors (221201688711).

401440101321 is a wasteful number, since it uses less digits than its factorization.

401440101321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730885060 (or 2730885053 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 401440101321 its reverse (123101044104), we get a palindrome (524541145425).

The spelling of 401440101321 in words is "four hundred one billion, four hundred forty million, one hundred one thousand, three hundred twenty-one".