11021211111 has 16 divisors (see below), whose sum is σ = 14849961984. Its totient is φ = 7270131264.

The previous prime is 11021211083. The next prime is 11021211119. The reversal of 11021211111 is 11111212011.

It is not a de Polignac number, because 11021211111 - 2¹⁰ = 11021210087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021211119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255066 + ... + 295128.

It is an arithmetic number, because the mean of its divisors is an integer number (928122624).

Almost surely, 2^11021211111 is an apocalyptic number.

11021211111 is a deficient number, since it is larger than the sum of its proper divisors (3828750873).

11021211111 is a wasteful number, since it uses less digits than its factorization.

11021211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41030.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11021211111 its reverse (11111212011), we get a palindrome (22132423122).

The spelling of 11021211111 in words is "eleven billion, twenty-one million, two hundred eleven thousand, one hundred eleven".