21220202200511 has 2 divisors, whose sum is σ = 21220202200512. Its totient is φ = 21220202200510.

The previous prime is 21220202200453. The next prime is 21220202200567. The reversal of 21220202200511 is 11500220202212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220202200511 is a prime.

It is a super-2 number, since 2×21220202200511² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220202700511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610101100255 + 10610101100256.

It is an arithmetic number, because the mean of its divisors is an integer number (10610101100256).

Almost surely, 2^{21220202200511} is an apocalyptic number.

21220202200511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220202200511 is an equidigital number, since it uses as much as digits as its factorization.

21220202200511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 21220202200511 its reverse (11500220202212), we get a palindrome (32720422402723).

The spelling of 21220202200511 in words is "twenty-one trillion, two hundred twenty billion, two hundred two million, two hundred thousand, five hundred eleven".