11218821498 has 12 divisors (see below), whose sum is σ = 24307446618. Its totient is φ = 3739607160.

The previous prime is 11218821473. The next prime is 11218821517. The reversal of 11218821498 is 89412881211.

It is a happy number.

11218821498 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7917974289 + 3300847209 = 88983^2 + 57453^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 311633913 + ... + 311633948.

Almost surely, 2^11218821498 is an apocalyptic number.

11218821498 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11218821498 is an abundant number, since it is smaller than the sum of its proper divisors (13088625120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11218821498 is a wasteful number, since it uses less digits than its factorization.

11218821498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623267869 (or 623267866 counting only the distinct ones).

The product of its digits is 73728, while the sum is 45.

The spelling of 11218821498 in words is "eleven billion, two hundred eighteen million, eight hundred twenty-one thousand, four hundred ninety-eight".