1111000121320 has 96 divisors (see below), whose sum is σ = 2552897201400. Its totient is φ = 434993202176.

The previous prime is 1111000121311. The next prime is 1111000121339. The reversal of 1111000121320 is 231210001111.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 245843422276 + 865156699044 = 495826^2 + 930138^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1111000121320.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 903986466 + ... + 903987694.

Almost surely, 2^{1111000121320} is an apocalyptic number.

1111000121320 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 1111000121320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1276448600700).

1111000121320 is an abundant number, since it is smaller than the sum of its proper divisors (1441897080080).

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

1111000121320 is an equidigital number, since it uses as much as digits as its factorization.

1111000121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599 (or 1942 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1111000121320 its reverse (231210001111), we get a palindrome (1342210122431).

The spelling of 1111000121320 in words is "one trillion, one hundred eleven billion, one hundred twenty-one thousand, three hundred twenty".