21214339191 has 6 divisors (see below), whose sum is σ = 30642934400. Its totient is φ = 14142892788.

The previous prime is 21214339183. The next prime is 21214339199. The reversal of 21214339191 is 19193341212.

It is a happy number.

21214339191 is a `hidden beast` number, since 21 + 214 + 339 + 1 + 91 = 666.

It is an interprime number because it is at equal distance from previous prime (21214339183) and next prime (21214339199).

It is not a de Polignac number, because 21214339191 - 2³ = 21214339183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214339199) 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 5 ways as a sum of consecutive naturals, for example, 1178574391 + ... + 1178574408.

Almost surely, 2^21214339191 is an apocalyptic number.

21214339191 is a deficient number, since it is larger than the sum of its proper divisors (9428595209).

21214339191 is a wasteful number, since it uses less digits than its factorization.

21214339191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357148805 (or 2357148802 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The spelling of 21214339191 in words is "twenty-one billion, two hundred fourteen million, three hundred thirty-nine thousand, one hundred ninety-one".