1331242011 has 54 divisors (see below), whose sum is σ = 2225462148. Its totient is φ = 760389120.

The previous prime is 1331241991. The next prime is 1331242019. The reversal of 1331242011 is 1102421331.

It is not a de Polignac number, because 1331242011 - 2⁷ = 1331241883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331242019) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 6897531 + ... + 6897723.

It is an arithmetic number, because the mean of its divisors is an integer number (41212262).

Almost surely, 2^1331242011 is an apocalyptic number.

1331242011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1331242011 is a deficient number, since it is larger than the sum of its proper divisors (894220137).

1331242011 is a wasteful number, since it uses less digits than its factorization.

1331242011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 226 counting only the distinct ones).

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

The square root of 1331242011 is about 36486.1893186998. The cubic root of 1331242011 is about 1100.0666656566.

Adding to 1331242011 its reverse (1102421331), we get a palindrome (2433663342).

It can be divided in two parts, 1331 and 242011, that added together give a palindrome (243342).

The spelling of 1331242011 in words is "one billion, three hundred thirty-one million, two hundred forty-two thousand, eleven".