23112221211221 has 8 divisors (see below), whose sum is σ = 23254251469920. Its totient is φ = 22970193849072.

The previous prime is 23112221211133. The next prime is 23112221211257. The reversal of 23112221211221 is 12211212221132.

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-23112221211221 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 (23112221211271) 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 7 ways as a sum of consecutive naturals, for example, 16544651 + ... + 17887143.

It is an arithmetic number, because the mean of its divisors is an integer number (2906781433740).

Almost surely, 2^{23112221211221} is an apocalyptic number.

It is an amenable number.

23112221211221 is a deficient number, since it is larger than the sum of its proper divisors (142030258699).

23112221211221 is a wasteful number, since it uses less digits than its factorization.

23112221211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448275.

The product of its digits is 384, while the sum is 23.

Adding to 23112221211221 its reverse (12211212221132), we get a palindrome (35323433432353).

The spelling of 23112221211221 in words is "twenty-three trillion, one hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty-one".