2112121121 has 8 divisors (see below), whose sum is σ = 2304494688. Its totient is φ = 1919808000.

The previous prime is 2112121097. The next prime is 2112121133. The reversal of 2112121121 is 1211212112.

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

It is not a de Polignac number, because 2112121121 - 2¹⁰ = 2112120097 is a prime.

It is a super-2 number, since 2×2112121121² = 8922111259548593282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2112121096 and 2112121105.

It is not an unprimeable number, because it can be changed into a prime (2112121181) 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, 89441 + ... + 110561.

It is an arithmetic number, because the mean of its divisors is an integer number (288061836).

Almost surely, 2^2112121121 is an apocalyptic number.

It is an amenable number.

2112121121 is a deficient number, since it is larger than the sum of its proper divisors (192373567).

2112121121 is a wasteful number, since it uses less digits than its factorization.

2112121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30223.

The product of its digits is 16, while the sum is 14.

The square root of 2112121121 is about 45957.8189321469. The cubic root of 2112121121 is about 1283.0382580298.

Adding to 2112121121 its reverse (1211212112), we get a palindrome (3323333233).

Subtracting from 2112121121 its reverse (1211212112), we obtain a palindrome (900909009).

The spelling of 2112121121 in words is "two billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-one".