11112212021018 has 4 divisors (see below), whose sum is σ = 16668318031530. Its totient is φ = 5556106010508.

The previous prime is 11112212021011. The next prime is 11112212021087. The reversal of 11112212021018 is 81012021221111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10497450960529 + 614761060489 = 3239977^2 + 784067^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11112212020984 and 11112212021002.

It is not an unprimeable number, because it can be changed into a prime (11112212021011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2778053005253 + ... + 2778053005256.

Almost surely, 2^{11112212021018} is an apocalyptic number.

11112212021018 is a deficient number, since it is larger than the sum of its proper divisors (5556106010512).

11112212021018 is an equidigital number, since it uses as much as digits as its factorization.

11112212021018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5556106010511.

The product of its (nonzero) digits is 128, while the sum is 23.

Adding to 11112212021018 its reverse (81012021221111), we get a palindrome (92124233242129).

The spelling of 11112212021018 in words is "eleven trillion, one hundred twelve billion, two hundred twelve million, twenty-one thousand, eighteen".