2112122122121 has 16 divisors (see below), whose sum is σ = 2308532425920. Its totient is φ = 1916447142720.

The previous prime is 2112122122067. The next prime is 2112122122127. The reversal of 2112122122121 is 1212212212112.

It is not a de Polignac number, because 2112122122121 - 2⁶ = 2112122122057 is a prime.

It is a super-2 number, since 2×2112122122121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2112122122093 and 2112122122102.

It is not an unprimeable number, because it can be changed into a prime (2112122122127) 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 15 ways as a sum of consecutive naturals, for example, 20524031 + ... + 20626683.

It is an arithmetic number, because the mean of its divisors is an integer number (144283276620).

Almost surely, 2^{2112122122121} is an apocalyptic number.

It is an amenable number.

2112122122121 is a deficient number, since it is larger than the sum of its proper divisors (196410303799).

2112122122121 is a wasteful number, since it uses less digits than its factorization.

2112122122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106216.

The product of its digits is 128, while the sum is 20.

Adding to 2112122122121 its reverse (1212212212112), we get a palindrome (3324334334233).

The spelling of 2112122122121 in words is "two trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-one".