12012022222121 has 4 divisors (see below), whose sum is σ = 12191306135952. Its totient is φ = 11832738308292.

The previous prime is 12012022222117. The next prime is 12012022222127. The reversal of 12012022222121 is 12122222021021.

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 not a de Polignac number, because 12012022222121 - 2² = 12012022222117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012022222093 and 12012022222102.

It is not an unprimeable number, because it can be changed into a prime (12012022222127) 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, 89641956815 + ... + 89641956948.

It is an arithmetic number, because the mean of its divisors is an integer number (3047826533988).

Almost surely, 2^{12012022222121} is an apocalyptic number.

It is an amenable number.

12012022222121 is a deficient number, since it is larger than the sum of its proper divisors (179283913831).

12012022222121 is an equidigital number, since it uses as much as digits as its factorization.

12012022222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179283913830.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12012022222121 its reverse (12122222021021), we get a palindrome (24134244243142).

The spelling of 12012022222121 in words is "twelve trillion, twelve billion, twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".