11220122521 has 2 divisors, whose sum is σ = 11220122522. Its totient is φ = 11220122520.

The previous prime is 11220122479. The next prime is 11220122539. The reversal of 11220122521 is 12522102211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11059466896 + 160655625 = 105164^2 + 12675^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220122521 - 2⁷ = 11220122393 is a prime.

It is a super-2 number, since 2×11220122521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11220122561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610061260 + 5610061261.

It is an arithmetic number, because the mean of its divisors is an integer number (5610061261).

Almost surely, 2^11220122521 is an apocalyptic number.

It is an amenable number.

11220122521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220122521 is an equidigital number, since it uses as much as digits as its factorization.

11220122521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 11220122521 its reverse (12522102211), we get a palindrome (23742224732).

The spelling of 11220122521 in words is "eleven billion, two hundred twenty million, one hundred twenty-two thousand, five hundred twenty-one".