21121023233321 has 4 divisors (see below), whose sum is σ = 23041116254544. Its totient is φ = 19200930212100.

The previous prime is 21121023233311. The next prime is 21121023233329. The reversal of 21121023233321 is 12333232012112.

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 21121023233321 - 2³⁰ = 21119949491497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121023233329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960046510595 + ... + 960046510616.

It is an arithmetic number, because the mean of its divisors is an integer number (5760279063636).

Almost surely, 2^{21121023233321} is an apocalyptic number.

It is an amenable number.

21121023233321 is a deficient number, since it is larger than the sum of its proper divisors (1920093021223).

21121023233321 is a wasteful number, since it uses less digits than its factorization.

21121023233321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920093021222.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21121023233321 its reverse (12333232012112), we get a palindrome (33454255245433).

The spelling of 21121023233321 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-three million, two hundred thirty-three thousand, three hundred twenty-one".