21202330121 has 8 divisors (see below), whose sum is σ = 24235269120. Its totient is φ = 18170399808.

The previous prime is 21202330117. The next prime is 21202330133. The reversal of 21202330121 is 12103320212.

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

It is a cyclic number.

It is not a de Polignac number, because 21202330121 - 2² = 21202330117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21202330121.

It is not an unprimeable number, because it can be changed into a prime (21202330141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206576 + ... + 291681.

It is an arithmetic number, because the mean of its divisors is an integer number (3029408640).

Almost surely, 2^21202330121 is an apocalyptic number.

It is an amenable number.

21202330121 is a deficient number, since it is larger than the sum of its proper divisors (3032938999).

21202330121 is an equidigital number, since it uses as much as digits as its factorization.

21202330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504343.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21202330121 its reverse (12103320212), we get a palindrome (33305650333).

Subtracting from 21202330121 its reverse (12103320212), we obtain a palindrome (9099009909).

The spelling of 21202330121 in words is "twenty-one billion, two hundred two million, three hundred thirty thousand, one hundred twenty-one".