21214134361115 has 4 divisors (see below), whose sum is σ = 25456961233344. Its totient is φ = 16971307488888.

The previous prime is 21214134361111. The next prime is 21214134361177. The reversal of 21214134361115 is 51116343141212.

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

It is a cyclic number.

It is not a de Polignac number, because 21214134361115 - 2² = 21214134361111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214134361111) 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, 2121413436107 + ... + 2121413436116.

It is an arithmetic number, because the mean of its divisors is an integer number (6364240308336).

Almost surely, 2^{21214134361115} is an apocalyptic number.

21214134361115 is a deficient number, since it is larger than the sum of its proper divisors (4242826872229).

21214134361115 is an equidigital number, since it uses as much as digits as its factorization.

21214134361115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242826872228.

The product of its digits is 17280, while the sum is 35.

The spelling of 21214134361115 in words is "twenty-one trillion, two hundred fourteen billion, one hundred thirty-four million, three hundred sixty-one thousand, one hundred fifteen".