12210012022121 has 4 divisors (see below), whose sum is σ = 12210128658000. Its totient is φ = 12209895386244.

The previous prime is 12210012022073. The next prime is 12210012022147. The reversal of 12210012022121 is 12122021001221.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12210012022121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12210012022121.

It is not an unprimeable number, because it can be changed into a prime (12210017022121) 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, 58160771 + ... + 58370328.

It is an arithmetic number, because the mean of its divisors is an integer number (3052532164500).

Almost surely, 2^{12210012022121} is an apocalyptic number.

It is an amenable number.

12210012022121 is a deficient number, since it is larger than the sum of its proper divisors (116635879).

12210012022121 is a wasteful number, since it uses less digits than its factorization.

12210012022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116635878.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12210012022121 its reverse (12122021001221), we get a palindrome (24332033023342).

The spelling of 12210012022121 in words is "twelve trillion, two hundred ten billion, twelve million, twenty-two thousand, one hundred twenty-one".