21124140426542 has 8 divisors (see below), whose sum is σ = 32778838593000. Its totient is φ = 10197860895544.

The previous prime is 21124140426527. The next prime is 21124140426551. The reversal of 21124140426542 is 24562404142112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21124140426496 and 21124140426505.

It is a congruent number.

It is an unprimeable number.

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, 182104658792 + ... + 182104658907.

It is an arithmetic number, because the mean of its divisors is an integer number (4097354824125).

Almost surely, 2^{21124140426542} is an apocalyptic number.

21124140426542 is a deficient number, since it is larger than the sum of its proper divisors (11654698166458).

21124140426542 is a wasteful number, since it uses less digits than its factorization.

21124140426542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364209317730.

The product of its (nonzero) digits is 122880, while the sum is 38.

Adding to 21124140426542 its reverse (24562404142112), we get a palindrome (45686544568654).

The spelling of 21124140426542 in words is "twenty-one trillion, one hundred twenty-four billion, one hundred forty million, four hundred twenty-six thousand, five hundred forty-two".