1311450221312 has 144 divisors (see below), whose sum is σ = 3351933295872. Its totient is φ = 497144770560.

The previous prime is 1311450221239. The next prime is 1311450221369. The reversal of 1311450221312 is 2131220541131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169718 + ... + 1628405.

Almost surely, 2^{1311450221312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311450221312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1675966647936).

1311450221312 is an abundant number, since it is smaller than the sum of its proper divisors (2040483074560).

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

1311450221312 is a wasteful number, since it uses less digits than its factorization.

1311450221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798194 (or 1798180 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 1311450221312 its reverse (2131220541131), we get a palindrome (3442670762443).

The spelling of 1311450221312 in words is "one trillion, three hundred eleven billion, four hundred fifty million, two hundred twenty-one thousand, three hundred twelve".