1011212211 has 4 divisors (see below), whose sum is σ = 1348282952. Its totient is φ = 674141472.

The previous prime is 1011212177. The next prime is 1011212231. The reversal of 1011212211 is 1122121101.

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

It is not a de Polignac number, because 1011212211 - 2⁹ = 1011211699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011212231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168535366 + ... + 168535371.

It is an arithmetic number, because the mean of its divisors is an integer number (337070738).

Almost surely, 2^1011212211 is an apocalyptic number.

1011212211 is a deficient number, since it is larger than the sum of its proper divisors (337070741).

1011212211 is an equidigital number, since it uses as much as digits as its factorization.

1011212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337070740.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1011212211 is about 31799.5630630359. The cubic root of 1011212211 is about 1003.7235218433.

Adding to 1011212211 its reverse (1122121101), we get a palindrome (2133333312).

The spelling of 1011212211 in words is "one billion, eleven million, two hundred twelve thousand, two hundred eleven".