11211210022211 has 4 divisors (see below), whose sum is σ = 11870692964712. Its totient is φ = 10551727079712.

The previous prime is 11211210022171. The next prime is 11211210022237. The reversal of 11211210022211 is 11222001211211.

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 11211210022211 - 2⁶ = 11211210022147 is a prime.

It is a super-2 number, since 2×11211210022211² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 659482942483 = 11211210022211 / (1 + 1 + 2 + 1 + 1 + 2 + 1 + 0 + 0 + 2 + 2 + 2 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11211210022211.

It is not an unprimeable number, because it can be changed into a prime (11211210021211) 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, 329741471225 + ... + 329741471258.

It is an arithmetic number, because the mean of its divisors is an integer number (2967673241178).

Almost surely, 2^{11211210022211} is an apocalyptic number.

11211210022211 is a deficient number, since it is larger than the sum of its proper divisors (659482942501).

11211210022211 is an equidigital number, since it uses as much as digits as its factorization.

11211210022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659482942500.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11211210022211 its reverse (11222001211211), we get a palindrome (22433211233422).

The spelling of 11211210022211 in words is "eleven trillion, two hundred eleven billion, two hundred ten million, twenty-two thousand, two hundred eleven".