12213002121 has 16 divisors (see below), whose sum is σ = 16350558528. Its totient is φ = 8108755200.

The previous prime is 12213002099. The next prime is 12213002173. The reversal of 12213002121 is 12120031221.

It is not a de Polignac number, because 12213002121 - 2⁶ = 12213002057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12213002121.

It is not an unprimeable number, because it can be changed into a prime (12213006121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3008325 + ... + 3012381.

It is an arithmetic number, because the mean of its divisors is an integer number (1021909908).

Almost surely, 2^12213002121 is an apocalyptic number.

It is an amenable number.

12213002121 is a deficient number, since it is larger than the sum of its proper divisors (4137556407).

12213002121 is a wasteful number, since it uses less digits than its factorization.

12213002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7912.

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

Adding to 12213002121 its reverse (12120031221), we get a palindrome (24333033342).

The spelling of 12213002121 in words is "twelve billion, two hundred thirteen million, two thousand, one hundred twenty-one".