12023232121 has 2 divisors, whose sum is σ = 12023232122. Its totient is φ = 12023232120.

The previous prime is 12023232101. The next prime is 12023232191. The reversal of 12023232121 is 12123232021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6982942096 + 5040290025 = 83564^2 + 70995^2 .

It is an emirp because it is prime and its reverse (12123232021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12023232121 - 2¹¹ = 12023230073 is a prime.

It is a super-2 number, since 2×12023232121² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12023232101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6011616060 + 6011616061.

It is an arithmetic number, because the mean of its divisors is an integer number (6011616061).

Almost surely, 2^12023232121 is an apocalyptic number.

It is an amenable number.

12023232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12023232121 is an equidigital number, since it uses as much as digits as its factorization.

12023232121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12023232121 its reverse (12123232021), we get a palindrome (24146464142).

It can be divided in two parts, 1202 and 3232121, that added together give a palindrome (3233323).

The spelling of 12023232121 in words is "twelve billion, twenty-three million, two hundred thirty-two thousand, one hundred twenty-one".