39970980221 has 4 divisors (see below), whose sum is σ = 39971433600. Its totient is φ = 39970526844.

The previous prime is 39970980191. The next prime is 39970980233. The reversal of 39970980221 is 12208907993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12208907993 = 3719 ⋅3282847.

It is a cyclic number.

It is not a de Polignac number, because 39970980221 - 2¹⁰ = 39970979197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 39970980221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39970980281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46931 + ... + 286608.

It is an arithmetic number, because the mean of its divisors is an integer number (9992858400).

Almost surely, 2^39970980221 is an apocalyptic number.

It is an amenable number.

39970980221 is a deficient number, since it is larger than the sum of its proper divisors (453379).

39970980221 is a wasteful number, since it uses less digits than its factorization.

39970980221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453378.

The product of its (nonzero) digits is 489888, while the sum is 50.

The spelling of 39970980221 in words is "thirty-nine billion, nine hundred seventy million, nine hundred eighty thousand, two hundred twenty-one".