23012002121 has 4 divisors (see below), whose sum is σ = 23050292244. Its totient is φ = 22973712000.

The previous prime is 23012002099. The next prime is 23012002129. The reversal of 23012002121 is 12120021032.

It is a happy number.

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 19938852025 + 3073150096 = 141205^2 + 55436^2 .

It is a cyclic number.

It is not a de Polignac number, because 23012002121 - 2³⁰ = 21938260297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23012002096 and 23012002105.

It is not an unprimeable number, because it can be changed into a prime (23012002129) 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, 19144160 + ... + 19145361.

It is an arithmetic number, because the mean of its divisors is an integer number (5762573061).

Almost surely, 2^23012002121 is an apocalyptic number.

It is an amenable number.

23012002121 is a deficient number, since it is larger than the sum of its proper divisors (38290123).

23012002121 is an equidigital number, since it uses as much as digits as its factorization.

23012002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38290122.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 23012002121 its reverse (12120021032), we get a palindrome (35132023153).

The spelling of 23012002121 in words is "twenty-three billion, twelve million, two thousand, one hundred twenty-one".