12121012023 has 4 divisors (see below), whose sum is σ = 16161349368. Its totient is φ = 8080674680.

The previous prime is 12121011989. The next prime is 12121012037. The reversal of 12121012023 is 32021012121.

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

It is a cyclic number.

It is not a de Polignac number, because 12121012023 - 2²⁹ = 11584141111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12121011993 and 12121012011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121012723) 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, 2020168668 + ... + 2020168673.

It is an arithmetic number, because the mean of its divisors is an integer number (4040337342).

Almost surely, 2^12121012023 is an apocalyptic number.

12121012023 is a deficient number, since it is larger than the sum of its proper divisors (4040337345).

12121012023 is an equidigital number, since it uses as much as digits as its factorization.

12121012023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040337344.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12121012023 its reverse (32021012121), we get a palindrome (44142024144).

The spelling of 12121012023 in words is "twelve billion, one hundred twenty-one million, twelve thousand, twenty-three".