11133233981 has 2 divisors, whose sum is σ = 11133233982. Its totient is φ = 11133233980.

The previous prime is 11133233963. The next prime is 11133233983. The reversal of 11133233981 is 18933233111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5878288900 + 5254945081 = 76670^2 + 72491^2 .

It is a cyclic number.

It is not a de Polignac number, because 11133233981 - 2²⁶ = 11066125117 is a prime.

It is a super-2 number, since 2×11133233981² (a number of 21 digits) contains 22 as substring.

Together with 11133233983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11133233983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5566616990 + 5566616991.

It is an arithmetic number, because the mean of its divisors is an integer number (5566616991).

Almost surely, 2^11133233981 is an apocalyptic number.

It is an amenable number.

11133233981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11133233981 is an equidigital number, since it uses as much as digits as its factorization.

11133233981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The spelling of 11133233981 in words is "eleven billion, one hundred thirty-three million, two hundred thirty-three thousand, nine hundred eighty-one".