21210303424142 has 8 divisors (see below), whose sum is σ = 36360520155696. Its totient is φ = 9090130038912.

The previous prime is 21210303424129. The next prime is 21210303424159. The reversal of 21210303424142 is 24142430301212.

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

It is a congruent number.

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, 757510836563 + ... + 757510836590.

It is an arithmetic number, because the mean of its divisors is an integer number (4545065019462).

Almost surely, 2^{21210303424142} is an apocalyptic number.

21210303424142 is a deficient number, since it is larger than the sum of its proper divisors (15150216731554).

21210303424142 is a wasteful number, since it uses less digits than its factorization.

21210303424142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515021673162.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21210303424142 its reverse (24142430301212), we get a palindrome (45352733725354).

The spelling of 21210303424142 in words is "twenty-one trillion, two hundred ten billion, three hundred three million, four hundred twenty-four thousand, one hundred forty-two".