11211313220 has 96 divisors (see below), whose sum is σ = 24401938176. Its totient is φ = 4324723200.

The previous prime is 11211313207. The next prime is 11211313283. The reversal of 11211313220 is 2231311211.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30056954 + ... + 30057326.

It is an arithmetic number, because the mean of its divisors is an integer number (254186856).

Almost surely, 2^11211313220 is an apocalyptic number.

11211313220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211313220 is an abundant number, since it is smaller than the sum of its proper divisors (13190624956).

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

11211313220 is a wasteful number, since it uses less digits than its factorization.

11211313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11211313220 its reverse (2231311211), we get a palindrome (13442624431).

The spelling of 11211313220 in words is "eleven billion, two hundred eleven million, three hundred thirteen thousand, two hundred twenty".