1001131111 has 8 divisors (see below), whose sum is σ = 1007577648. Its totient is φ = 994704000.

The previous prime is 1001131049. The next prime is 1001131123. The reversal of 1001131111 is 1111311001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001131111 - 2²³ = 992742503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001131711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106596 + ... + 115606.

It is an arithmetic number, because the mean of its divisors is an integer number (125947206).

Almost surely, 2^1001131111 is an apocalyptic number.

1001131111 is a deficient number, since it is larger than the sum of its proper divisors (6446537).

1001131111 is an equidigital number, since it uses as much as digits as its factorization.

1001131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9713.

The product of its (nonzero) digits is 3, while the sum is 10.

The square root of 1001131111 is about 31640.6559824540. The cubic root of 1001131111 is about 1000.3768949324.

Adding to 1001131111 its reverse (1111311001), we get a palindrome (2112442112).

The spelling of 1001131111 in words is "one billion, one million, one hundred thirty-one thousand, one hundred eleven".