21530401130143 has 4 divisors (see below), whose sum is σ = 21739434150928. Its totient is φ = 21321368109360.

The previous prime is 21530401130137. The next prime is 21530401130221. The reversal of 21530401130143 is 34103110403512.

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 21530401130143 - 2¹³ = 21530401121951 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 (21530401130113) 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, 104516510238 + ... + 104516510443.

It is an arithmetic number, because the mean of its divisors is an integer number (5434858537732).

Almost surely, 2^{21530401130143} is an apocalyptic number.

21530401130143 is a deficient number, since it is larger than the sum of its proper divisors (209033020785).

21530401130143 is a wasteful number, since it uses less digits than its factorization.

21530401130143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209033020784.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 21530401130143 its reverse (34103110403512), we get a palindrome (55633511533655).

The spelling of 21530401130143 in words is "twenty-one trillion, five hundred thirty billion, four hundred one million, one hundred thirty thousand, one hundred forty-three".