1311111230 has 96 divisors (see below), whose sum is σ = 2958524352. Its totient is φ = 414120960.

The previous prime is 1311111227. The next prime is 1311111293. The reversal of 1311111230 is 321111131.

It is a happy number.

It is a super-2 number, since 2×1311111230² = 3438025314864225800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 264959 + ... + 269861.

It is an arithmetic number, because the mean of its divisors is an integer number (30817962).

Almost surely, 2^1311111230 is an apocalyptic number.

1311111230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311111230 is an abundant number, since it is smaller than the sum of its proper divisors (1647413122).

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

1311111230 is a wasteful number, since it uses less digits than its factorization.

1311111230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4962 (or 4951 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1311111230 is about 36209.2699456921. The cubic root of 1311111230 is about 1094.4934807655.

Adding to 1311111230 its reverse (321111131), we get a palindrome (1632222361).

Subtracting from 1311111230 its reverse (321111131), we obtain a palindrome (990000099).

The spelling of 1311111230 in words is "one billion, three hundred eleven million, one hundred eleven thousand, two hundred thirty".