11211121201211 has 8 divisors (see below), whose sum is σ = 11397810523200. Its totient is φ = 11024525442240.

The previous prime is 11211121201207. The next prime is 11211121201213. The reversal of 11211121201211 is 11210212111211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11211121201211 - 2² = 11211121201207 is a prime.

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 11211121201211.

It is not an unprimeable number, because it can be changed into a prime (11211121201213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23149091 + ... + 23628428.

It is an arithmetic number, because the mean of its divisors is an integer number (1424726315400).

Almost surely, 2^{11211121201211} is an apocalyptic number.

11211121201211 is a deficient number, since it is larger than the sum of its proper divisors (186689321989).

11211121201211 is an equidigital number, since it uses as much as digits as its factorization.

11211121201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46781509.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11211121201211 its reverse (11210212111211), we get a palindrome (22421333312422).

The spelling of 11211121201211 in words is "eleven trillion, two hundred eleven billion, one hundred twenty-one million, two hundred one thousand, two hundred eleven".