21134340141423 has 4 divisors (see below), whose sum is σ = 28179120188568. Its totient is φ = 14089560094280.

The previous prime is 21134340141377. The next prime is 21134340141433. The reversal of 21134340141423 is 32414104343112.

It is a happy number.

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 21134340141423 - 2⁶ = 21134340141359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134340141433) 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, 3522390023568 + ... + 3522390023573.

It is an arithmetic number, because the mean of its divisors is an integer number (7044780047142).

Almost surely, 2^{21134340141423} is an apocalyptic number.

21134340141423 is a deficient number, since it is larger than the sum of its proper divisors (7044780047145).

21134340141423 is an equidigital number, since it uses as much as digits as its factorization.

21134340141423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7044780047144.

The product of its (nonzero) digits is 27648, while the sum is 33.

Adding to 21134340141423 its reverse (32414104343112), we get a palindrome (53548444484535).

The spelling of 21134340141423 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred forty million, one hundred forty-one thousand, four hundred twenty-three".