11311002120 has 256 divisors, whose sum is σ = 38411470080. Its totient is φ = 2640384000.

The previous prime is 11311002091. The next prime is 11311002133. The reversal of 11311002120 is 2120011311.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11311002096 and 11311002105.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4931694 + ... + 4933986.

It is an arithmetic number, because the mean of its divisors is an integer number (150044805).

Almost surely, 2^11311002120 is an apocalyptic number.

11311002120 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 11311002120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19205735040).

11311002120 is an abundant number, since it is smaller than the sum of its proper divisors (27100467960).

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

11311002120 is a wasteful number, since it uses less digits than its factorization.

11311002120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456 (or 2452 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 11311002120 its reverse (2120011311), we get a palindrome (13431013431).

The spelling of 11311002120 in words is "eleven billion, three hundred eleven million, two thousand, one hundred twenty".