2122221212121 has 8 divisors (see below), whose sum is σ = 2829749647680. Its totient is φ = 1414753458992.

The previous prime is 2122221212051. The next prime is 2122221212129. The reversal of 2122221212121 is 1212121222212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2122221212121 - 2¹³ = 2122221203929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2122221212129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15088941 + ... + 15228938.

It is an arithmetic number, because the mean of its divisors is an integer number (353718705960).

Almost surely, 2^{2122221212121} is an apocalyptic number.

It is an amenable number.

2122221212121 is a deficient number, since it is larger than the sum of its proper divisors (707528435559).

2122221212121 is a wasteful number, since it uses less digits than its factorization.

2122221212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30341215.

The product of its digits is 256, while the sum is 21.

Adding to 2122221212121 its reverse (1212121222212), we get a palindrome (3334342434333).

The spelling of 2122221212121 in words is "two trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".