1000122211 has 4 divisors (see below), whose sum is σ = 1091042424. Its totient is φ = 909202000.

The previous prime is 1000122191. The next prime is 1000122239. The reversal of 1000122211 is 1122210001.

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-1000122211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000122911) 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, 45460090 + ... + 45460111.

It is an arithmetic number, because the mean of its divisors is an integer number (272760606).

Almost surely, 2^1000122211 is an apocalyptic number.

1000122211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1000122211 is a deficient number, since it is larger than the sum of its proper divisors (90920213).

1000122211 is an equidigital number, since it uses as much as digits as its factorization.

1000122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90920212.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1000122211 is about 31624.7088682252. The cubic root of 1000122211 is about 1000.0407353406.

Adding to 1000122211 its reverse (1122210001), we get a palindrome (2122332212).

The spelling of 1000122211 in words is "one billion, one hundred twenty-two thousand, two hundred eleven".