11011213111 has 4 divisors (see below), whose sum is σ = 11023066800. Its totient is φ = 10999359424.

The previous prime is 11011213097. The next prime is 11011213133. The reversal of 11011213111 is 11131211011.

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 11011213111 - 2⁵ = 11011213079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011213091 and 11011213100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011213181) 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, 5925451 + ... + 5927308.

It is an arithmetic number, because the mean of its divisors is an integer number (2755766700).

Almost surely, 2^11011213111 is an apocalyptic number.

11011213111 is a deficient number, since it is larger than the sum of its proper divisors (11853689).

11011213111 is an equidigital number, since it uses as much as digits as its factorization.

11011213111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11853688.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 11011213111 its reverse (11131211011), we get a palindrome (22142424122).

The spelling of 11011213111 in words is "eleven billion, eleven million, two hundred thirteen thousand, one hundred eleven".