212241121 has 2 divisors, whose sum is σ = 212241122. Its totient is φ = 212241120.

The previous prime is 212241119. The next prime is 212241131. The reversal of 212241121 is 121142212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204175521 + 8065600 = 14289^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 212241121 - 2¹ = 212241119 is a prime.

Together with 212241119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 212241095 and 212241104.

It is not a weakly prime, because it can be changed into another prime (212241101) 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 as a sum of consecutive naturals, namely, 106120560 + 106120561.

It is an arithmetic number, because the mean of its divisors is an integer number (106120561).

Almost surely, 2^212241121 is an apocalyptic number.

It is an amenable number.

212241121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212241121 is an equidigital number, since it uses as much as digits as its factorization.

212241121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64, while the sum is 16.

The square root of 212241121 is about 14568.4975546554. The cubic root of 212241121 is about 596.4991698560.

Adding to 212241121 its reverse (121142212), we get a palindrome (333383333).

The spelling of 212241121 in words is "two hundred twelve million, two hundred forty-one thousand, one hundred twenty-one".