1002113111 has 4 divisors (see below), whose sum is σ = 1012444272. Its totient is φ = 991781952.

The previous prime is 1002113107. The next prime is 1002113113. The reversal of 1002113111 is 1113112001.

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 1002113111 - 2² = 1002113107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002113092 and 1002113101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002113113) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5165435 + ... + 5165628.

It is an arithmetic number, because the mean of its divisors is an integer number (253111068).

Almost surely, 2^1002113111 is an apocalyptic number.

1002113111 is a deficient number, since it is larger than the sum of its proper divisors (10331161).

1002113111 is an equidigital number, since it uses as much as digits as its factorization.

1002113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10331160.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1002113111 is about 31656.1701884483. The cubic root of 1002113111 is about 1000.7038747774.

Adding to 1002113111 its reverse (1113112001), we get a palindrome (2115225112).

It can be divided in two parts, 10021 and 13111, that added together give a palindrome (23132).

The spelling of 1002113111 in words is "one billion, two million, one hundred thirteen thousand, one hundred eleven".