11232120281 has 2 divisors, whose sum is σ = 11232120282. Its totient is φ = 11232120280.

The previous prime is 11232120227. The next prime is 11232120287. The reversal of 11232120281 is 18202123211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8809511881 + 2422608400 = 93859^2 + 49220^2 .

It is a cyclic number.

It is not a de Polignac number, because 11232120281 - 2⁶ = 11232120217 is a prime.

It is a super-2 number, since 2×11232120281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11232120287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5616060140 + 5616060141.

It is an arithmetic number, because the mean of its divisors is an integer number (5616060141).

Almost surely, 2^11232120281 is an apocalyptic number.

It is an amenable number.

11232120281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11232120281 is an equidigital number, since it uses as much as digits as its factorization.

11232120281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 11232120281 its reverse (18202123211), we get a palindrome (29434243492).

The spelling of 11232120281 in words is "eleven billion, two hundred thirty-two million, one hundred twenty thousand, two hundred eighty-one".