23121113331011 has 4 divisors (see below), whose sum is σ = 23130840347832. Its totient is φ = 23111386314192.

The previous prime is 23121113330993. The next prime is 23121113331047. The reversal of 23121113331011 is 11013331112132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23121113331011 - 2⁶ = 23121113330947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121113331311) 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, 4863504845 + ... + 4863509598.

It is an arithmetic number, because the mean of its divisors is an integer number (5782710086958).

Almost surely, 2^{23121113331011} is an apocalyptic number.

23121113331011 is a deficient number, since it is larger than the sum of its proper divisors (9727016821).

23121113331011 is an equidigital number, since it uses as much as digits as its factorization.

23121113331011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9727016820.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 23121113331011 its reverse (11013331112132), we get a palindrome (34134444443143).

The spelling of 23121113331011 in words is "twenty-three trillion, one hundred twenty-one billion, one hundred thirteen million, three hundred thirty-one thousand, eleven".