11120210021 has 2 divisors, whose sum is σ = 11120210022. Its totient is φ = 11120210020.

The previous prime is 11120209979. The next prime is 11120210089. The reversal of 11120210021 is 12001202111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10439730625 + 680479396 = 102175^2 + 26086^2 .

It is an emirp because it is prime and its reverse (12001202111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11120210021 - 2⁶ = 11120209957 is a prime.

It is a super-2 number, since 2×11120210021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11120209984 and 11120210011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11120212021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560105010 + 5560105011.

It is an arithmetic number, because the mean of its divisors is an integer number (5560105011).

Almost surely, 2^11120210021 is an apocalyptic number.

It is an amenable number.

11120210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11120210021 is an equidigital number, since it uses as much as digits as its factorization.

11120210021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11120210021 its reverse (12001202111), we get a palindrome (23121412132).

The spelling of 11120210021 in words is "eleven billion, one hundred twenty million, two hundred ten thousand, twenty-one".