21302142102442 has 8 divisors (see below), whose sum is σ = 31953361892256. Its totient is φ = 10651021471692.

The previous prime is 21302142102419. The next prime is 21302142102533. The reversal of 21302142102442 is 24420124120312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21302142102442.

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, 24250348 + ... + 25113415.

It is an arithmetic number, because the mean of its divisors is an integer number (3994170236532).

Almost surely, 2^{21302142102442} is an apocalyptic number.

21302142102442 is a deficient number, since it is larger than the sum of its proper divisors (10651219789814).

21302142102442 is a wasteful number, since it uses less digits than its factorization.

21302142102442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49579532.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21302142102442 its reverse (24420124120312), we get a palindrome (45722266222754).

The spelling of 21302142102442 in words is "twenty-one trillion, three hundred two billion, one hundred forty-two million, one hundred two thousand, four hundred forty-two".