11220330210521 has 2 divisors, whose sum is σ = 11220330210522. Its totient is φ = 11220330210520.

The previous prime is 11220330210247. The next prime is 11220330210547. The reversal of 11220330210521 is 12501203302211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7605240217600 + 3615089992921 = 2757760^2 + 1901339^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220330210521 - 2⁴² = 6822283699417 is a prime.

It is not a weakly prime, because it can be changed into another prime (11220330218521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610165105260 + 5610165105261.

It is an arithmetic number, because the mean of its divisors is an integer number (5610165105261).

Almost surely, 2^{11220330210521} is an apocalyptic number.

It is an amenable number.

11220330210521 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220330210521 is an equidigital number, since it uses as much as digits as its factorization.

11220330210521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 11220330210521 its reverse (12501203302211), we get a palindrome (23721533512732).

The spelling of 11220330210521 in words is "eleven trillion, two hundred twenty billion, three hundred thirty million, two hundred ten thousand, five hundred twenty-one".