11321012220 has 96 divisors (see below), whose sum is σ = 36579099648. Its totient is φ = 2562527232.

The previous prime is 11321012203. The next prime is 11321012243. The reversal of 11321012220 is 2221012311.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11321012220.

It is a congruent number.

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, 87589 + ... + 174108.

It is an arithmetic number, because the mean of its divisors is an integer number (381032288).

Almost surely, 2^11321012220 is an apocalyptic number.

11321012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11321012220 is an abundant number, since it is smaller than the sum of its proper divisors (25258087428).

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

11321012220 is a wasteful number, since it uses less digits than its factorization.

11321012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261819 (or 261817 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11321012220 its reverse (2221012311), we get a palindrome (13542024531).

Subtracting from 11321012220 its reverse (2221012311), we obtain a palindrome (9099999909).

The spelling of 11321012220 in words is "eleven billion, three hundred twenty-one million, twelve thousand, two hundred twenty".