12002322121 has 4 divisors (see below), whose sum is σ = 12063247812. Its totient is φ = 11941396432.

The previous prime is 12002322113. The next prime is 12002322131. The reversal of 12002322121 is 12122320021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12122320021 = 7 ⋅1731760003.

It can be written as a sum of positive squares in 2 ways, for example, as 11879910025 + 122412096 = 108995^2 + 11064^2 .

It is a cyclic number.

It is not a de Polignac number, because 12002322121 - 2³ = 12002322113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002322095 and 12002322104.

It is not an unprimeable number, because it can be changed into a prime (12002322131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30462550 + ... + 30462943.

It is an arithmetic number, because the mean of its divisors is an integer number (3015811953).

Almost surely, 2^12002322121 is an apocalyptic number.

It is an amenable number.

12002322121 is a deficient number, since it is larger than the sum of its proper divisors (60925691).

12002322121 is an equidigital number, since it uses as much as digits as its factorization.

12002322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60925690.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12002322121 its reverse (12122320021), we get a palindrome (24124642142).

The spelling of 12002322121 in words is "twelve billion, two million, three hundred twenty-two thousand, one hundred twenty-one".