23121213330221 has 8 divisors (see below), whose sum is σ = 23286980316600. Its totient is φ = 22956015013632.

The previous prime is 23121213330167. The next prime is 23121213330223. The reversal of 23121213330221 is 12203331212132.

It can be written as a sum of positive squares in 4 ways, for example, as 7167667562500 + 15953545767721 = 2677250^2 + 3994189^2 .

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 23121213330221 - 2¹⁴ = 23121213313837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121213330223) 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, 142085840 + ... + 142248473.

It is an arithmetic number, because the mean of its divisors is an integer number (2910872539575).

Almost surely, 2^{23121213330221} is an apocalyptic number.

It is an amenable number.

23121213330221 is a deficient number, since it is larger than the sum of its proper divisors (165766986379).

23121213330221 is a wasteful number, since it uses less digits than its factorization.

23121213330221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284334895.

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

Adding to 23121213330221 its reverse (12203331212132), we get a palindrome (35324544542353).

The spelling of 23121213330221 in words is "twenty-three trillion, one hundred twenty-one billion, two hundred thirteen million, three hundred thirty thousand, two hundred twenty-one".