2112022121 has 16 divisors (see below), whose sum is σ = 2508926400. Its totient is φ = 1756238400.

The previous prime is 2112022111. The next prime is 2112022141. The reversal of 2112022121 is 1212202112.

It is not a de Polignac number, because 2112022121 - 2¹⁸ = 2111759977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112022096 and 2112022105.

It is not an unprimeable number, because it can be changed into a prime (2112022111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168170 + ... + 180291.

It is an arithmetic number, because the mean of its divisors is an integer number (156807900).

Almost surely, 2^2112022121 is an apocalyptic number.

It is an amenable number.

2112022121 is a deficient number, since it is larger than the sum of its proper divisors (396904279).

2112022121 is a wasteful number, since it uses less digits than its factorization.

2112022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348520.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2112022121 is about 45956.7418449132. The cubic root of 2112022121 is about 1283.0182113935.

Adding to 2112022121 its reverse (1212202112), we get a palindrome (3324224233).

Subtracting from 2112022121 its reverse (1212202112), we obtain a square (899820009 = 29997²).

The spelling of 2112022121 in words is "two billion, one hundred twelve million, twenty-two thousand, one hundred twenty-one".