11233120021 has 2 divisors, whose sum is σ = 11233120022. Its totient is φ = 11233120020.

The previous prime is 11233120013. The next prime is 11233120037. The reversal of 11233120021 is 12002133211.

It is an a-pointer prime, because the next prime (11233120037) can be obtained adding 11233120021 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11056522500 + 176597521 = 105150^2 + 13289^2 .

It is a cyclic number.

It is not a de Polignac number, because 11233120021 - 2³ = 11233120013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11233119977 and 11233120004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11233120051) 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, 5616560010 + 5616560011.

It is an arithmetic number, because the mean of its divisors is an integer number (5616560011).

Almost surely, 2^11233120021 is an apocalyptic number.

It is an amenable number.

11233120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11233120021 is an equidigital number, since it uses as much as digits as its factorization.

11233120021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 11233120021 its reverse (12002133211), we get a palindrome (23235253232).

The spelling of 11233120021 in words is "eleven billion, two hundred thirty-three million, one hundred twenty thousand, twenty-one".