23012133221 has 16 divisors (see below), whose sum is σ = 28758965760. Its totient is φ = 17888711280.

The previous prime is 23012133217. The next prime is 23012133251. The reversal of 23012133221 is 12233121032.

It is not a de Polignac number, because 23012133221 - 2² = 23012133217 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23012133193 and 23012133202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23012133251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324371 + ... + 388896.

It is an arithmetic number, because the mean of its divisors is an integer number (1797435360).

Almost surely, 2^23012133221 is an apocalyptic number.

It is an amenable number.

23012133221 is a deficient number, since it is larger than the sum of its proper divisors (5746832539).

23012133221 is a wasteful number, since it uses less digits than its factorization.

23012133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713704.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23012133221 its reverse (12233121032), we get a palindrome (35245254253).

The spelling of 23012133221 in words is "twenty-three billion, twelve million, one hundred thirty-three thousand, two hundred twenty-one".