1311202242 has 96 divisors (see below), whose sum is σ = 3386178432. Its totient is φ = 372501504.

The previous prime is 1311202199. The next prime is 1311202247. The reversal of 1311202242 is 2422021131.

It is a happy number.

1311202242 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1311202247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 655588 + ... + 657584.

It is an arithmetic number, because the mean of its divisors is an integer number (35272692).

Almost surely, 2^1311202242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311202242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1693089216).

1311202242 is an abundant number, since it is smaller than the sum of its proper divisors (2074976190).

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

1311202242 is a wasteful number, since it uses less digits than its factorization.

1311202242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214 (or 2202 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1311202242 is about 36210.5266738831. The cubic root of 1311202242 is about 1094.5188052723.

Adding to 1311202242 its reverse (2422021131), we get a palindrome (3733223373).

The spelling of 1311202242 in words is "one billion, three hundred eleven million, two hundred two thousand, two hundred forty-two".