221108933439 has 20 divisors (see below), whose sum is σ = 330325237440. Its totient is φ = 147394036800.

The previous prime is 221108933429. The next prime is 221108933483. The reversal of 221108933439 is 934339801122.

221108933439 is a `hidden beast` number, since 2 + 21 + 108 + 93 + 3 + 439 = 666.

It is not a de Polignac number, because 221108933439 - 2¹⁷ = 221108802367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221108933394 and 221108933403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221108933429) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 961447 + ... + 1169015.

It is an arithmetic number, because the mean of its divisors is an integer number (16516261872).

Almost surely, 2^221108933439 is an apocalyptic number.

221108933439 is a deficient number, since it is larger than the sum of its proper divisors (109216304001).

221108933439 is a wasteful number, since it uses less digits than its factorization.

221108933439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220732 (or 220723 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 221108933439 in words is "two hundred twenty-one billion, one hundred eight million, nine hundred thirty-three thousand, four hundred thirty-nine".