21214144104143 has 4 divisors (see below), whose sum is σ = 21573705868680. Its totient is φ = 20854582339608.

The previous prime is 21214144104113. The next prime is 21214144104151. The reversal of 21214144104143 is 34140144141212.

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 21214144104143 - 2⁶ = 21214144104079 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 (21214144104113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179780882180 + ... + 179780882297.

It is an arithmetic number, because the mean of its divisors is an integer number (5393426467170).

Almost surely, 2^{21214144104143} is an apocalyptic number.

21214144104143 is a deficient number, since it is larger than the sum of its proper divisors (359561764537).

21214144104143 is an equidigital number, since it uses as much as digits as its factorization.

21214144104143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359561764536.

The product of its (nonzero) digits is 12288, while the sum is 32.

Adding to 21214144104143 its reverse (34140144141212), we get a palindrome (55354288245355).

The spelling of 21214144104143 in words is "twenty-one trillion, two hundred fourteen billion, one hundred forty-four million, one hundred four thousand, one hundred forty-three".