11220330121 has 72 divisors (see below), whose sum is σ = 15569857800. Its totient is φ = 8008197120.

The previous prime is 11220330119. The next prime is 11220330127. The reversal of 11220330121 is 12103302211.

It can be written as a sum of positive squares in 4 ways, for example, as 653518096 + 10566812025 = 25564^2 + 102795^2 .

It is not a de Polignac number, because 11220330121 - 2¹ = 11220330119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11220330095 and 11220330104.

It is not an unprimeable number, because it can be changed into a prime (11220330127) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11483985 + ... + 11484961.

It is an arithmetic number, because the mean of its divisors is an integer number (216248025).

Almost surely, 2^11220330121 is an apocalyptic number.

11220330121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11220330121 is a deficient number, since it is larger than the sum of its proper divisors (4349527679).

11220330121 is a wasteful number, since it uses less digits than its factorization.

11220330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11220330121 its reverse (12103302211), we get a palindrome (23323632332).

The spelling of 11220330121 in words is "eleven billion, two hundred twenty million, three hundred thirty thousand, one hundred twenty-one".