23123023213121 has 4 divisors (see below), whose sum is σ = 24901717306452. Its totient is φ = 21344329119792.

The previous prime is 23123023213097. The next prime is 23123023213123. The reversal of 23123023213121 is 12131232032132.

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 15094499306896 + 8028523906225 = 3885164^2 + 2833465^2 .

It is a cyclic number.

It is not a de Polignac number, because 23123023213121 - 2⁶ = 23123023213057 is a prime.

It is a super-2 number, since 2×23123023213121² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23123023213123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889347046646 + ... + 889347046671.

It is an arithmetic number, because the mean of its divisors is an integer number (6225429326613).

Almost surely, 2^{23123023213121} is an apocalyptic number.

It is an amenable number.

23123023213121 is a deficient number, since it is larger than the sum of its proper divisors (1778694093331).

23123023213121 is a wasteful number, since it uses less digits than its factorization.

23123023213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778694093330.

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

Adding to 23123023213121 its reverse (12131232032132), we get a palindrome (35254255245253).

The spelling of 23123023213121 in words is "twenty-three trillion, one hundred twenty-three billion, twenty-three million, two hundred thirteen thousand, one hundred twenty-one".