212221153 has 2 divisors, whose sum is σ = 212221154. Its totient is φ = 212221152.

The previous prime is 212221067. The next prime is 212221157. The reversal of 212221153 is 351122212.

212221153 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., 153958464 + 58262689 = 12408^2 + 7633^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221153 - 2²⁵ = 178666721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212221153.

It is not a weakly prime, because it can be changed into another prime (212221157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110576 + 106110577.

It is an arithmetic number, because the mean of its divisors is an integer number (106110577).

Almost surely, 2^212221153 is an apocalyptic number.

It is an amenable number.

212221153 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221153 is an equidigital number, since it uses as much as digits as its factorization.

212221153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 19.

The square root of 212221153 is about 14567.8122242154. The cubic root of 212221153 is about 596.4804627224.

Adding to 212221153 its reverse (351122212), we get a palindrome (563343365).

The spelling of 212221153 in words is "two hundred twelve million, two hundred twenty-one thousand, one hundred fifty-three".