21403143141242 has 8 divisors (see below), whose sum is σ = 32156580165600. Its totient is φ = 10684283086044.

The previous prime is 21403143141239. The next prime is 21403143141293. The reversal of 21403143141242 is 24214134130412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21403143141242² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21403143141199 and 21403143141208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8644240742 + ... + 8644243217.

It is an arithmetic number, because the mean of its divisors is an integer number (4019572520700).

Almost surely, 2^{21403143141242} is an apocalyptic number.

21403143141242 is a deficient number, since it is larger than the sum of its proper divisors (10753437024358).

21403143141242 is a wasteful number, since it uses less digits than its factorization.

21403143141242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17288484580.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 21403143141242 its reverse (24214134130412), we get a palindrome (45617277271654).

The spelling of 21403143141242 in words is "twenty-one trillion, four hundred three billion, one hundred forty-three million, one hundred forty-one thousand, two hundred forty-two".