11221212202211 has 4 divisors (see below), whose sum is σ = 12241322402424. Its totient is φ = 10201102002000.

The previous prime is 11221212202183. The next prime is 11221212202243. The reversal of 11221212202211 is 11220221212211.

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 11221212202211 - 2⁴² = 6823165691107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221212204211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510055100090 + ... + 510055100111.

It is an arithmetic number, because the mean of its divisors is an integer number (3060330600606).

Almost surely, 2^{11221212202211} is an apocalyptic number.

11221212202211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11221212202211 is a deficient number, since it is larger than the sum of its proper divisors (1020110200213).

11221212202211 is a wasteful number, since it uses less digits than its factorization.

11221212202211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020110200212.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11221212202211 its reverse (11220221212211), we get a palindrome (22441433414422).

The spelling of 11221212202211 in words is "eleven trillion, two hundred twenty-one billion, two hundred twelve million, two hundred two thousand, two hundred eleven".