23112211213121 has 4 divisors (see below), whose sum is σ = 23112233402544. Its totient is φ = 23112189023700.

The previous prime is 23112211213093. The next prime is 23112211213151. The reversal of 23112211213121 is 12131211221132.

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 a de Polignac number, because none of the positive numbers 2^k-23112211213121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23112211213151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9451175 + ... + 11642556.

It is an arithmetic number, because the mean of its divisors is an integer number (5778058350636).

Almost surely, 2^{23112211213121} is an apocalyptic number.

It is an amenable number.

23112211213121 is a deficient number, since it is larger than the sum of its proper divisors (22189423).

23112211213121 is a wasteful number, since it uses less digits than its factorization.

23112211213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22189422.

The product of its digits is 288, while the sum is 23.

Adding to 23112211213121 its reverse (12131211221132), we get a palindrome (35243422434253).

The spelling of 23112211213121 in words is "twenty-three trillion, one hundred twelve billion, two hundred eleven million, two hundred thirteen thousand, one hundred twenty-one".