2212021121 has 4 divisors (see below), whose sum is σ = 2214716244. Its totient is φ = 2209326000.

The previous prime is 2212021087. The next prime is 2212021169. The reversal of 2212021121 is 1211202122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 301369600 + 1910651521 = 17360^2 + 43711^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212021121 - 2¹⁸ = 2211758977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212021096 and 2212021105.

It is not an unprimeable number, because it can be changed into a prime (2212021171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1346330 + ... + 1347971.

It is an arithmetic number, because the mean of its divisors is an integer number (553679061).

Almost surely, 2^2212021121 is an apocalyptic number.

It is an amenable number.

2212021121 is a deficient number, since it is larger than the sum of its proper divisors (2695123).

2212021121 is an equidigital number, since it uses as much as digits as its factorization.

2212021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695122.

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

The square root of 2212021121 is about 47032.1286037534. The cubic root of 2212021121 is about 1302.9560190887.

Adding to 2212021121 its reverse (1211202122), we get a palindrome (3423223243).

The spelling of 2212021121 in words is "two billion, two hundred twelve million, twenty-one thousand, one hundred twenty-one".