21244231123042 has 16 divisors (see below), whose sum is σ = 32967074649600. Its totient is φ = 10255248204880.

The previous prime is 21244231123007. The next prime is 21244231123061. The reversal of 21244231123042 is 24032113244212.

It is a junction number, because it is equal to n+sod(n) for n = 21244231122995 and 21244231123013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9469192 + ... + 11495827.

It is an arithmetic number, because the mean of its divisors is an integer number (2060442165600).

Almost surely, 2^{21244231123042} is an apocalyptic number.

21244231123042 is a deficient number, since it is larger than the sum of its proper divisors (11722843526558).

21244231123042 is a wasteful number, since it uses less digits than its factorization.

21244231123042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20982521.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21244231123042 its reverse (24032113244212), we get a palindrome (45276344367254).

The spelling of 21244231123042 in words is "twenty-one trillion, two hundred forty-four billion, two hundred thirty-one million, one hundred twenty-three thousand, forty-two".