21220211141 has 2 divisors, whose sum is σ = 21220211142. Its totient is φ = 21220211140.

The previous prime is 21220211099. The next prime is 21220211143. The reversal of 21220211141 is 14111202212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21004415041 + 215796100 = 144929^2 + 14690^2 .

It is a cyclic number.

It is not a de Polignac number, because 21220211141 - 2¹⁴ = 21220194757 is a prime.

Together with 21220211143, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220211143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610105570 + 10610105571.

It is an arithmetic number, because the mean of its divisors is an integer number (10610105571).

Almost surely, 2^21220211141 is an apocalyptic number.

It is an amenable number.

21220211141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220211141 is an equidigital number, since it uses as much as digits as its factorization.

21220211141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21220211141 its reverse (14111202212), we get a palindrome (35331413353).

The spelling of 21220211141 in words is "twenty-one billion, two hundred twenty million, two hundred eleven thousand, one hundred forty-one".