1000022111 has 4 divisors (see below), whose sum is σ = 1090933224. Its totient is φ = 909111000.

The previous prime is 1000022081. The next prime is 1000022173. The reversal of 1000022111 is 1112200001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000022111 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 (1000025111) 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, 45455540 + ... + 45455561.

It is an arithmetic number, because the mean of its divisors is an integer number (272733306).

Almost surely, 2^1000022111 is an apocalyptic number.

1000022111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1000022111 is a deficient number, since it is larger than the sum of its proper divisors (90911113).

1000022111 is an equidigital number, since it uses as much as digits as its factorization.

1000022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90911112.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1000022111 is about 31623.1262053580. The cubic root of 1000022111 is about 1000.0073702790.

Adding to 1000022111 its reverse (1112200001), we get a palindrome (2112222112).

The spelling of 1000022111 in words is "one billion, twenty-two thousand, one hundred eleven".