1311213402 has 48 divisors (see below), whose sum is σ = 2895085440. Its totient is φ = 428815296.

The previous prime is 1311213401. The next prime is 1311213403. The reversal of 1311213402 is 2043121131.

It is an interprime number because it is at equal distance from previous prime (1311213401) and next prime (1311213403).

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 (1311213401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228958 + ... + 234614.

It is an arithmetic number, because the mean of its divisors is an integer number (60314280).

Almost surely, 2^1311213402 is an apocalyptic number.

1311213402 is an abundant number, since it is smaller than the sum of its proper divisors (1583872038).

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

1311213402 is a wasteful number, since it uses less digits than its factorization.

1311213402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5907 (or 5904 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1311213402 is about 36210.6807723909. The cubic root of 1311213402 is about 1094.5219105129.

Adding to 1311213402 its reverse (2043121131), we get a palindrome (3354334533).

The spelling of 1311213402 in words is "one billion, three hundred eleven million, two hundred thirteen thousand, four hundred two".