2219394939221 has 32 divisors (see below), whose sum is σ = 2397146400000. Its totient is φ = 2048466309120.

The previous prime is 2219394939187. The next prime is 2219394939253. The reversal of 2219394939221 is 1229394939122.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2219394939221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2219394939521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250803005 + ... + 250811853.

It is an arithmetic number, because the mean of its divisors is an integer number (74910825000).

Almost surely, 2^{2219394939221} is an apocalyptic number.

It is an amenable number.

2219394939221 is a deficient number, since it is larger than the sum of its proper divisors (177751460779).

2219394939221 is a wasteful number, since it uses less digits than its factorization.

2219394939221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11117.

The product of its digits is 3779136, while the sum is 56.

Subtracting from 2219394939221 its reverse (1229394939122), we obtain a palindrome (990000000099).

The spelling of 2219394939221 in words is "two trillion, two hundred nineteen billion, three hundred ninety-four million, nine hundred thirty-nine thousand, two hundred twenty-one".