11001122381 has 2 divisors, whose sum is σ = 11001122382. Its totient is φ = 11001122380.

The previous prime is 11001122333. The next prime is 11001122383. The reversal of 11001122381 is 18322110011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5530153225 + 5470969156 = 74365^2 + 73966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11001122381 is a prime.

It is a super-2 number, since 2×11001122381² (a number of 21 digits) contains 22 as substring.

Together with 11001122383, 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 (11001122383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500561190 + 5500561191.

It is an arithmetic number, because the mean of its divisors is an integer number (5500561191).

Almost surely, 2^11001122381 is an apocalyptic number.

It is an amenable number.

11001122381 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001122381 is an equidigital number, since it uses as much as digits as its factorization.

11001122381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 11001122381 its reverse (18322110011), we get a palindrome (29323232392).

The spelling of 11001122381 in words is "eleven billion, one million, one hundred twenty-two thousand, three hundred eighty-one".