11154233381 has 4 divisors (see below), whose sum is σ = 11159474700. Its totient is φ = 11148992064.

The previous prime is 11154233369. The next prime is 11154233383. The reversal of 11154233381 is 18333245111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18333245111 = 17 ⋅1078426183.

It can be written as a sum of positive squares in 2 ways, for example, as 6674073025 + 4480160356 = 81695^2 + 66934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11154233381 is a prime.

It is a super-2 number, since 2×11154233381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11154233383) 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 in 3 ways as a sum of consecutive naturals, for example, 2617466 + ... + 2621723.

It is an arithmetic number, because the mean of its divisors is an integer number (2789868675).

Almost surely, 2^11154233381 is an apocalyptic number.

It is an amenable number.

11154233381 is a deficient number, since it is larger than the sum of its proper divisors (5241319).

11154233381 is an equidigital number, since it uses as much as digits as its factorization.

11154233381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5241318.

The product of its digits is 8640, while the sum is 32.

Adding to 11154233381 its reverse (18333245111), we get a palindrome (29487478492).

The spelling of 11154233381 in words is "eleven billion, one hundred fifty-four million, two hundred thirty-three thousand, three hundred eighty-one".