23123033212121 has 4 divisors (see below), whose sum is σ = 23123639374500. Its totient is φ = 23122427049744.

The previous prime is 23123033212117. The next prime is 23123033212151. The reversal of 23123033212121 is 12121233032132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13580617965721 + 9542415246400 = 3685189^2 + 3089080^2 .

It is a cyclic number.

It is not a de Polignac number, because 23123033212121 - 2² = 23123033212117 is a prime.

It is a super-3 number, since 3×23123033212121³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23123033212151) 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 3 ways as a sum of consecutive naturals, for example, 303023966 + ... + 303100263.

It is an arithmetic number, because the mean of its divisors is an integer number (5780909843625).

Almost surely, 2^{23123033212121} is an apocalyptic number.

It is an amenable number.

23123033212121 is a deficient number, since it is larger than the sum of its proper divisors (606162379).

23123033212121 is an equidigital number, since it uses as much as digits as its factorization.

23123033212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606162378.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 23123033212121 its reverse (12121233032132), we get a palindrome (35244266244253).

The spelling of 23123033212121 in words is "twenty-three trillion, one hundred twenty-three billion, thirty-three million, two hundred twelve thousand, one hundred twenty-one".