1002011111 has 4 divisors (see below), whose sum is σ = 1004627712. Its totient is φ = 999394512.

The previous prime is 1002011099. The next prime is 1002011119. The reversal of 1002011111 is 1111102001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1002011111 - 2¹⁴ = 1001994727 is a prime.

It is a Duffinian number.

1002011111 is a modest number, since divided by 11111 gives 10020 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002011119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1307726 + ... + 1308491.

It is an arithmetic number, because the mean of its divisors is an integer number (251156928).

Almost surely, 2^1002011111 is an apocalyptic number.

1002011111 is a deficient number, since it is larger than the sum of its proper divisors (2616601).

1002011111 is an equidigital number, since it uses as much as digits as its factorization.

1002011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616600.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1002011111 is about 31654.5590871205. The cubic root of 1002011111 is about 1000.6699214384.

Adding to 1002011111 its reverse (1111102001), we get a palindrome (2113113112).

The spelling of 1002011111 in words is "one billion, two million, eleven thousand, one hundred eleven".