11111112012211 has 4 divisors (see below), whose sum is σ = 11111309385424. Its totient is φ = 11110914639000.

The previous prime is 11111112012127. The next prime is 11111112012241. The reversal of 11111112012211 is 11221021111111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111112012211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111112012241) 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, 98602140 + ... + 98714761.

It is an arithmetic number, because the mean of its divisors is an integer number (2777827346356).

Almost surely, 2^{11111112012211} is an apocalyptic number.

11111112012211 is a deficient number, since it is larger than the sum of its proper divisors (197373213).

11111112012211 is an equidigital number, since it uses as much as digits as its factorization.

11111112012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197373212.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11111112012211 its reverse (11221021111111), we get a palindrome (22332133123322).

The spelling of 11111112012211 in words is "eleven trillion, one hundred eleven billion, one hundred twelve million, twelve thousand, two hundred eleven".