1311143244402 has 32 divisors (see below), whose sum is σ = 2686808263104. Its totient is φ = 426298592000.

The previous prime is 1311143244343. The next prime is 1311143244403. The reversal of 1311143244402 is 2044423411131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311143244402.

It is not an unprimeable number, because it can be changed into a prime (1311143244403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620902 + ... + 1734302.

It is an arithmetic number, because the mean of its divisors is an integer number (83962758222).

Almost surely, 2^{1311143244402} is an apocalyptic number.

1311143244402 is an abundant number, since it is smaller than the sum of its proper divisors (1375665018702).

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

1311143244402 is a wasteful number, since it uses less digits than its factorization.

1311143244402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118234.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 1311143244402 its reverse (2044423411131), we get a palindrome (3355566655533).

The spelling of 1311143244402 in words is "one trillion, three hundred eleven billion, one hundred forty-three million, two hundred forty-four thousand, four hundred two".