1311212130 has 32 divisors (see below), whose sum is σ = 3190022784. Its totient is φ = 344866176.

The previous prime is 1311212117. The next prime is 1311212137. The reversal of 1311212130 is 312121131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1311212137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297174 + ... + 301553.

It is an arithmetic number, because the mean of its divisors is an integer number (99688212).

Almost surely, 2^1311212130 is an apocalyptic number.

1311212130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311212130 is an abundant number, since it is smaller than the sum of its proper divisors (1878810654).

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

1311212130 is a wasteful number, since it uses less digits than its factorization.

1311212130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598810.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1311212130 is about 36210.6632085081. The cubic root of 1311212130 is about 1094.5215565832.

Adding to 1311212130 its reverse (312121131), we get a palindrome (1623333261).

Subtracting from 1311212130 its reverse (312121131), we obtain a palindrome (999090999).

The spelling of 1311212130 in words is "one billion, three hundred eleven million, two hundred twelve thousand, one hundred thirty".