3972213241205 has 24 divisors (see below), whose sum is σ = 5274080109312. Its totient is φ = 2869750620000.

The previous prime is 3972213241193. The next prime is 3972213241237. The reversal of 3972213241205 is 5021423122793.

It is not a de Polignac number, because 3972213241205 - 2¹⁸ = 3972212979061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21649181 + ... + 21831890.

It is an arithmetic number, because the mean of its divisors is an integer number (219753337888).

Almost surely, 2^{3972213241205} is an apocalyptic number.

It is an amenable number.

3972213241205 is a deficient number, since it is larger than the sum of its proper divisors (1301866868107).

3972213241205 is a wasteful number, since it uses less digits than its factorization.

3972213241205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43481249 (or 43481238 counting only the distinct ones).

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

Adding to 3972213241205 its reverse (5021423122793), we get a palindrome (8993636363998).

The spelling of 3972213241205 in words is "three trillion, nine hundred seventy-two billion, two hundred thirteen million, two hundred forty-one thousand, two hundred five".