3944221357001 has 16 divisors (see below), whose sum is σ = 4134547845120. Its totient is φ = 3755467892880.

The previous prime is 3944221356997. The next prime is 3944221357039. The reversal of 3944221357001 is 1007531224493.

It is a cyclic number.

It is not a de Polignac number, because 3944221357001 - 2² = 3944221356997 is a prime.

It is a super-2 number, since 2×3944221357001² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3944221357001.

It is not an unprimeable number, because it can be changed into a prime (3944221357301) 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, 68140610 + ... + 68198468.

It is an arithmetic number, because the mean of its divisors is an integer number (258409240320).

Almost surely, 2^{3944221357001} is an apocalyptic number.

It is an amenable number.

3944221357001 is a deficient number, since it is larger than the sum of its proper divisors (190326488119).

3944221357001 is a wasteful number, since it uses less digits than its factorization.

3944221357001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71396.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 3944221357001 in words is "three trillion, nine hundred forty-four billion, two hundred twenty-one million, three hundred fifty-seven thousand, one".