211042121 has 2 divisors, whose sum is σ = 211042122. Its totient is φ = 211042120.

The previous prime is 211042057. The next prime is 211042133. The reversal of 211042121 is 121240112.

It is a happy number.

211042121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128504896 + 82537225 = 11336^2 + 9085^2 .

It is a cyclic number.

It is not a de Polignac number, because 211042121 - 2⁶ = 211042057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211042096 and 211042105.

It is not a weakly prime, because it can be changed into another prime (211042721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105521060 + 105521061.

It is an arithmetic number, because the mean of its divisors is an integer number (105521061).

Almost surely, 2^211042121 is an apocalyptic number.

It is an amenable number.

211042121 is a deficient number, since it is larger than the sum of its proper divisors (1).

211042121 is an equidigital number, since it uses as much as digits as its factorization.

211042121 is an evil number, because the sum of its binary digits is even.

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

The square root of 211042121 is about 14527.2888385961. The cubic root of 211042121 is about 595.3737933244.

Adding to 211042121 its reverse (121240112), we get a palindrome (332282233).

The spelling of 211042121 in words is "two hundred eleven million, forty-two thousand, one hundred twenty-one".