2112121011222 has 36 divisors (see below), whose sum is σ = 4783880913084. Its totient is φ = 673429884600.

The previous prime is 2112121011211. The next prime is 2112121011223. The reversal of 2112121011222 is 2221101212112.

2112121011222 is a `hidden beast` number, since 211 + 21 + 210 + 1 + 1 + 222 = 666.

It is a super-2 number, since 2×2112121011222² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2112121011195 and 2112121011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112121011223) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 110897904 + ... + 110916947.

It is an arithmetic number, because the mean of its divisors is an integer number (132885580919).

Almost surely, 2^{2112121011222} is an apocalyptic number.

2112121011222 is an abundant number, since it is smaller than the sum of its proper divisors (2671759901862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2112121011222 is a wasteful number, since it uses less digits than its factorization.

2112121011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221814905 (or 221814879 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2112121011222 its reverse (2221101212112), we get a palindrome (4333222223334).

The spelling of 2112121011222 in words is "two trillion, one hundred twelve billion, one hundred twenty-one million, eleven thousand, two hundred twenty-two".