2122212212121 has 16 divisors (see below), whose sum is σ = 2832888627200. Its totient is φ = 1413172802448.

The previous prime is 2122212212089. The next prime is 2122212212123. The reversal of 2122212212121 is 1212122122212.

It is not a de Polignac number, because 2122212212121 - 2⁵ = 2122212212089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2122212212123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10284600 + ... + 10488918.

It is an arithmetic number, because the mean of its divisors is an integer number (177055539200).

Almost surely, 2^{2122212212121} is an apocalyptic number.

It is an amenable number.

2122212212121 is a deficient number, since it is larger than the sum of its proper divisors (710676415079).

2122212212121 is a wasteful number, since it uses less digits than its factorization.

2122212212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208308.

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

Adding to 2122212212121 its reverse (1212122122212), we get a palindrome (3334334334333).

The spelling of 2122212212121 in words is "two trillion, one hundred twenty-two billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-one".