11388223681 has 2 divisors, whose sum is σ = 11388223682. Its totient is φ = 11388223680.

The previous prime is 11388223633. The next prime is 11388223697. The reversal of 11388223681 is 18632288311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10653542656 + 734681025 = 103216^2 + 27105^2 .

It is a cyclic number.

It is not a de Polignac number, because 11388223681 - 2²⁷ = 11254005953 is a prime.

It is a super-2 number, since 2×11388223681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11388223631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5694111840 + 5694111841.

It is an arithmetic number, because the mean of its divisors is an integer number (5694111841).

Almost surely, 2^11388223681 is an apocalyptic number.

It is an amenable number.

11388223681 is a deficient number, since it is larger than the sum of its proper divisors (1).

11388223681 is an equidigital number, since it uses as much as digits as its factorization.

11388223681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 43.

The spelling of 11388223681 in words is "eleven billion, three hundred eighty-eight million, two hundred twenty-three thousand, six hundred eighty-one".