12122221002221 has 32 divisors (see below), whose sum is σ = 13590775848960. Its totient is φ = 10718856808000.

The previous prime is 12122221002217. The next prime is 12122221002247. The reversal of 12122221002221 is 12220012222121.

It is not a de Polignac number, because 12122221002221 - 2² = 12122221002217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12122221002193 and 12122221002202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122221002721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97409180 + ... + 97533546.

It is an arithmetic number, because the mean of its divisors is an integer number (424711745280).

Almost surely, 2^{12122221002221} is an apocalyptic number.

12122221002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12122221002221 is a deficient number, since it is larger than the sum of its proper divisors (1468554846739).

12122221002221 is a wasteful number, since it uses less digits than its factorization.

12122221002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126025.

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

Adding to 12122221002221 its reverse (12220012222121), we get a palindrome (24342233224342).

The spelling of 12122221002221 in words is "twelve trillion, one hundred twenty-two billion, two hundred twenty-one million, two thousand, two hundred twenty-one".