21303242224121 has 8 divisors (see below), whose sum is σ = 25027585270464. Its totient is φ = 17876846621520.

The previous prime is 21303242224111. The next prime is 21303242224177. The reversal of 21303242224121 is 12142224230312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21303242224121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303242224111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74486860781 + ... + 74486861066.

It is an arithmetic number, because the mean of its divisors is an integer number (3128448158808).

Almost surely, 2^{21303242224121} is an apocalyptic number.

It is an amenable number.

21303242224121 is a deficient number, since it is larger than the sum of its proper divisors (3724343046343).

21303242224121 is a wasteful number, since it uses less digits than its factorization.

21303242224121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148973721871.

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

Adding to 21303242224121 its reverse (12142224230312), we get a palindrome (33445466454433).

The spelling of 21303242224121 in words is "twenty-one trillion, three hundred three billion, two hundred forty-two million, two hundred twenty-four thousand, one hundred twenty-one".