11211318020 has 48 divisors (see below), whose sum is σ = 27775147008. Its totient is φ = 3719882880.

The previous prime is 11211317993. The next prime is 11211318023. The reversal of 11211318020 is 2081311211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11211317983 and 11211318001.

It is not an unprimeable number, because it can be changed into a prime (11211318023) 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, 1287287 + ... + 1295966.

It is an arithmetic number, because the mean of its divisors is an integer number (578648896).

Almost surely, 2^11211318020 is an apocalyptic number.

11211318020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211318020 is an abundant number, since it is smaller than the sum of its proper divisors (16563828988).

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

11211318020 is a wasteful number, since it uses less digits than its factorization.

11211318020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583300 (or 2583298 counting only the distinct ones).

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

Adding to 11211318020 its reverse (2081311211), we get a palindrome (13292629231).

The spelling of 11211318020 in words is "eleven billion, two hundred eleven million, three hundred eighteen thousand, twenty".