4001221373 has 8 divisors (see below), whose sum is σ = 4088119296. Its totient is φ = 3915010800.

The previous prime is 4001221369. The next prime is 4001221387. The reversal of 4001221373 is 3731221004.

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

It is a cyclic number.

It is not a de Polignac number, because 4001221373 - 2² = 4001221369 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001281373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160061 + ... + 183362.

It is an arithmetic number, because the mean of its divisors is an integer number (511014912).

Almost surely, 2^4001221373 is an apocalyptic number.

It is an amenable number.

4001221373 is a deficient number, since it is larger than the sum of its proper divisors (86897923).

4001221373 is a wasteful number, since it uses less digits than its factorization.

4001221373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343675.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 4001221373 is about 63255.2082677782. The cubic root of 4001221373 is about 1587.5626029252.

Adding to 4001221373 its reverse (3731221004), we get a palindrome (7732442377).

The spelling of 4001221373 in words is "four billion, one million, two hundred twenty-one thousand, three hundred seventy-three".