12200002121 has 4 divisors (see below), whose sum is σ = 12207710592. Its totient is φ = 12192293652.

The previous prime is 12200002117. The next prime is 12200002147. The reversal of 12200002121 is 12120000221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12120000221 = 7 ⋅1731428603.

It is a cyclic number.

It is not a de Polignac number, because 12200002121 - 2² = 12200002117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12200002151) 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, 3851861 + ... + 3855026.

It is an arithmetic number, because the mean of its divisors is an integer number (3051927648).

Almost surely, 2^12200002121 is an apocalyptic number.

It is an amenable number.

12200002121 is a deficient number, since it is larger than the sum of its proper divisors (7708471).

12200002121 is an equidigital number, since it uses as much as digits as its factorization.

12200002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7708470.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12200002121 its reverse (12120000221), we get a palindrome (24320002342).

The spelling of 12200002121 in words is "twelve billion, two hundred million, two thousand, one hundred twenty-one".