1011222011211 has 4 divisors (see below), whose sum is σ = 1348296014952. Its totient is φ = 674148007472.

The previous prime is 1011222011179. The next prime is 1011222011279. The reversal of 1011222011211 is 1121102221101.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1011222011211 - 2⁵ = 1011222011179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011222011711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168537001866 + ... + 168537001871.

It is an arithmetic number, because the mean of its divisors is an integer number (337074003738).

Almost surely, 2^{1011222011211} is an apocalyptic number.

1011222011211 is a deficient number, since it is larger than the sum of its proper divisors (337074003741).

1011222011211 is an equidigital number, since it uses as much as digits as its factorization.

1011222011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337074003740.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1011222011211 its reverse (1121102221101), we get a palindrome (2132324232312).

The spelling of 1011222011211 in words is "one trillion, eleven billion, two hundred twenty-two million, eleven thousand, two hundred eleven".