12122122002221 has 64 divisors (see below), whose sum is σ = 15463815929856. Its totient is φ = 9229284979200.

The previous prime is 12122122002181. The next prime is 12122122002241. The reversal of 12122122002221 is 12220022122121.

It is a de Polignac number, because none of the positive numbers 2^k-12122122002221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12122122002193 and 12122122002202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122122002241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 384654761 + ... + 384686273.

It is an arithmetic number, because the mean of its divisors is an integer number (241622123904).

Almost surely, 2^{12122122002221} is an apocalyptic number.

12122122002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12122122002221 is a deficient number, since it is larger than the sum of its proper divisors (3341693927635).

12122122002221 is a wasteful number, since it uses less digits than its factorization.

12122122002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32202.

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

Adding to 12122122002221 its reverse (12220022122121), we get a palindrome (24342144124342).

The spelling of 12122122002221 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-two million, two thousand, two hundred twenty-one".