21101414399 has 4 divisors (see below), whose sum is σ = 22724600136. Its totient is φ = 19478228664.

The previous prime is 21101414387. The next prime is 21101414417. The reversal of 21101414399 is 99341410112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101414399 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 (21101414359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811592849 + ... + 811592874.

It is an arithmetic number, because the mean of its divisors is an integer number (5681150034).

Almost surely, 2^21101414399 is an apocalyptic number.

21101414399 is a deficient number, since it is larger than the sum of its proper divisors (1623185737).

21101414399 is a wasteful number, since it uses less digits than its factorization.

21101414399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1623185736.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 21101414399 in words is "twenty-one billion, one hundred one million, four hundred fourteen thousand, three hundred ninety-nine".