11310121220 has 144 divisors (see below), whose sum is σ = 25753728000. Its totient is φ = 4167313920.

The previous prime is 11310121213. The next prime is 11310121231. The reversal of 11310121220 is 2212101311.

It is a super-2 number, since 2×11310121220² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11310121195 and 11310121204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56834681 + ... + 56834879.

Almost surely, 2^11310121220 is an apocalyptic number.

11310121220 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 11310121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12876864000).

11310121220 is an abundant number, since it is smaller than the sum of its proper divisors (14443606780).

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

11310121220 is a wasteful number, since it uses less digits than its factorization.

11310121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11310121220 its reverse (2212101311), we get a palindrome (13522222531).

The spelling of 11310121220 in words is "eleven billion, three hundred ten million, one hundred twenty-one thousand, two hundred twenty".