4001321001 has 8 divisors (see below), whose sum is σ = 5507194624. Its totient is φ = 2581497360.

The previous prime is 4001320993. The next prime is 4001321053. The reversal of 4001321001 is 1001231004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4001321001 - 2³ = 4001320993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4001325001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21512386 + ... + 21512571.

It is an arithmetic number, because the mean of its divisors is an integer number (688399328).

Almost surely, 2^4001321001 is an apocalyptic number.

It is an amenable number.

4001321001 is a deficient number, since it is larger than the sum of its proper divisors (1505873623).

4001321001 is a wasteful number, since it uses less digits than its factorization.

4001321001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43024991.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 4001321001 is about 63255.9957711520. The cubic root of 4001321001 is about 1587.5757792665.

Adding to 4001321001 its reverse (1001231004), we get a palindrome (5002552005).

The spelling of 4001321001 in words is "four billion, one million, three hundred twenty-one thousand, one".