1111001331 has 16 divisors (see below), whose sum is σ = 1659679488. Its totient is φ = 655135200.

The previous prime is 1111001327. The next prime is 1111001347. The reversal of 1111001331 is 1331001111.

It is not a de Polignac number, because 1111001331 - 2² = 1111001327 is a prime.

It is a super-2 number, since 2×1111001331² = 2468647914967543122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1111001321) 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, 453735 + ... + 456176.

It is an arithmetic number, because the mean of its divisors is an integer number (103729968).

Almost surely, 2^1111001331 is an apocalyptic number.

1111001331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1111001331 is a deficient number, since it is larger than the sum of its proper divisors (548678157).

1111001331 is a wasteful number, since it uses less digits than its factorization.

1111001331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909962.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 1111001331 is about 33331.6865909903. The cubic root of 1111001331 is about 1035.7100562948.

Adding to 1111001331 its reverse (1331001111), we get a palindrome (2442002442).

The spelling of 1111001331 in words is "one billion, one hundred eleven million, one thousand, three hundred thirty-one".