11311130220 has 192 divisors, whose sum is σ = 35050143744. Its totient is φ = 2707891200.

The previous prime is 11311130137. The next prime is 11311130227. The reversal of 11311130220 is 2203111311.

It is a happy number.

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 11311130220.

It is not an unprimeable number, because it can be changed into a prime (11311130227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9826645 + ... + 9827795.

It is an arithmetic number, because the mean of its divisors is an integer number (182552832).

Almost surely, 2^11311130220 is an apocalyptic number.

11311130220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11311130220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17525071872).

11311130220 is an abundant number, since it is smaller than the sum of its proper divisors (23739013524).

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

11311130220 is a wasteful number, since it uses less digits than its factorization.

11311130220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512 (or 1510 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11311130220 its reverse (2203111311), we get a palindrome (13514241531).

The spelling of 11311130220 in words is "eleven billion, three hundred eleven million, one hundred thirty thousand, two hundred twenty".