39222221221 has 16 divisors (see below), whose sum is σ = 40871046528. Its totient is φ = 37604952000.

The previous prime is 39222221179. The next prime is 39222221231. The reversal of 39222221221 is 12212222293.

It is a cyclic number.

It is not a de Polignac number, because 39222221221 - 2¹³ = 39222213029 is a prime.

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 39222221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39222221231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8669466 + ... + 8673988.

It is an arithmetic number, because the mean of its divisors is an integer number (2554440408).

Almost surely, 2^39222221221 is an apocalyptic number.

It is an amenable number.

39222221221 is a deficient number, since it is larger than the sum of its proper divisors (1648825307).

39222221221 is a wasteful number, since it uses less digits than its factorization.

39222221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7932.

The product of its digits is 3456, while the sum is 28.

The spelling of 39222221221 in words is "thirty-nine billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".