23121223133 has 16 divisors (see below), whose sum is σ = 25714941696. Its totient is φ = 20677113600.

The previous prime is 23121223093. The next prime is 23121223187. The reversal of 23121223133 is 33132212132.

It is not a de Polignac number, because 23121223133 - 2⁸ = 23121222877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23121223099 and 23121223108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121223033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136766 + ... + 254847.

It is an arithmetic number, because the mean of its divisors is an integer number (1607183856).

Almost surely, 2^23121223133 is an apocalyptic number.

23121223133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23121223133 is a deficient number, since it is larger than the sum of its proper divisors (2593718563).

23121223133 is a wasteful number, since it uses less digits than its factorization.

23121223133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391804.

The product of its digits is 1296, while the sum is 23.

Adding to 23121223133 its reverse (33132212132), we get a palindrome (56253435265).

The spelling of 23121223133 in words is "twenty-three billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred thirty-three".