11211011218 has 32 divisors (see below), whose sum is σ = 19781858880. Its totient is φ = 4709952000.

The previous prime is 11211011183. The next prime is 11211011219. The reversal of 11211011218 is 81211011211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 11211011195 and 11211011204.

It is not an unprimeable number, because it can be changed into a prime (11211011219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309943 + ... + 344218.

It is an arithmetic number, because the mean of its divisors is an integer number (618183090).

Almost surely, 2^11211011218 is an apocalyptic number.

11211011218 is a deficient number, since it is larger than the sum of its proper divisors (8570847662).

11211011218 is a wasteful number, since it uses less digits than its factorization.

11211011218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654234.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 11211011218 its reverse (81211011211), we get a palindrome (92422022429).

The spelling of 11211011218 in words is "eleven billion, two hundred eleven million, eleven thousand, two hundred eighteen".