21212211341 has 2 divisors, whose sum is σ = 21212211342. Its totient is φ = 21212211340.

The previous prime is 21212211331. The next prime is 21212211353. The reversal of 21212211341 is 14311221212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19024684900 + 2187526441 = 137930^2 + 46771^2 .

It is a cyclic number.

It is not a de Polignac number, because 21212211341 - 2¹⁸ = 21211949197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212211331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606105670 + 10606105671.

It is an arithmetic number, because the mean of its divisors is an integer number (10606105671).

Almost surely, 2^21212211341 is an apocalyptic number.

It is an amenable number.

21212211341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212211341 is an equidigital number, since it uses as much as digits as its factorization.

21212211341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 20.

Adding to 21212211341 its reverse (14311221212), we get a palindrome (35523432553).

The spelling of 21212211341 in words is "twenty-one billion, two hundred twelve million, two hundred eleven thousand, three hundred forty-one".