1011222111 has 4 divisors (see below), whose sum is σ = 1348296152. Its totient is φ = 674148072.

The previous prime is 1011222031. The next prime is 1011222131. The reversal of 1011222111 is 1112221101.

1011222111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1011222111 - 2⁹ = 1011221599 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 (1011222131) 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, 168537016 + ... + 168537021.

It is an arithmetic number, because the mean of its divisors is an integer number (337074038).

Almost surely, 2^1011222111 is an apocalyptic number.

1011222111 is a deficient number, since it is larger than the sum of its proper divisors (337074041).

1011222111 is an equidigital number, since it uses as much as digits as its factorization.

1011222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337074040.

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

The square root of 1011222111 is about 31799.7187251711. The cubic root of 1011222111 is about 1003.7267973940.

Adding to 1011222111 its reverse (1112221101), we get a palindrome (2123443212).

It can be divided in two parts, 10112 and 22111, that added together give a palindrome (32223).

The spelling of 1011222111 in words is "one billion, eleven million, two hundred twenty-two thousand, one hundred eleven".