21211002330121 has 4 divisors (see below), whose sum is σ = 21212859209472. Its totient is φ = 21209145450772.

The previous prime is 21211002330031. The next prime is 21211002330149. The reversal of 21211002330121 is 12103320011212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21211002330121 - 2⁹ = 21211002329609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211002330181) 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 3 ways as a sum of consecutive naturals, for example, 928422541 + ... + 928445386.

It is an arithmetic number, because the mean of its divisors is an integer number (5303214802368).

Almost surely, 2^{21211002330121} is an apocalyptic number.

It is an amenable number.

21211002330121 is a deficient number, since it is larger than the sum of its proper divisors (1856879351).

21211002330121 is a wasteful number, since it uses less digits than its factorization.

21211002330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856879350.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21211002330121 its reverse (12103320011212), we get a palindrome (33314322341333).

The spelling of 21211002330121 in words is "twenty-one trillion, two hundred eleven billion, two million, three hundred thirty thousand, one hundred twenty-one".