1311200021010 has 96 divisors (see below), whose sum is σ = 3460089185280. Its totient is φ = 317763578880.

The previous prime is 1311200020993. The next prime is 1311200021039. The reversal of 1311200021010 is 101200021131.

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, 11446479 + ... + 11560461.

It is an arithmetic number, because the mean of its divisors is an integer number (36042595680).

Almost surely, 2^{1311200021010} is an apocalyptic number.

1311200021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311200021010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1730044592640).

1311200021010 is an abundant number, since it is smaller than the sum of its proper divisors (2148889164270).

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

1311200021010 is a wasteful number, since it uses less digits than its factorization.

1311200021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117184 (or 117173 counting only the distinct ones).

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

Adding to 1311200021010 its reverse (101200021131), we get a palindrome (1412400042141).

The spelling of 1311200021010 in words is "one trillion, three hundred eleven billion, two hundred million, twenty-one thousand, ten".