1000121111 has 8 divisors (see below), whose sum is σ = 1097071248. Its totient is φ = 904176000.

The previous prime is 1000121093. The next prime is 1000121113. The reversal of 1000121111 is 1111210001.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000121111 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 (1000121113) 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 7 ways as a sum of consecutive naturals, for example, 249170 + ... + 253151.

It is an arithmetic number, because the mean of its divisors is an integer number (137133906).

Almost surely, 2^1000121111 is an apocalyptic number.

1000121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1000121111 is a deficient number, since it is larger than the sum of its proper divisors (96950137).

1000121111 is a wasteful number, since it uses less digits than its factorization.

1000121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502513.

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

The square root of 1000121111 is about 31624.6914767559. The cubic root of 1000121111 is about 1000.0403687037.

Adding to 1000121111 its reverse (1111210001), we get a palindrome (2111331112).

The spelling of 1000121111 in words is "one billion, one hundred twenty-one thousand, one hundred eleven".