11011021221211 has 4 divisors (see below), whose sum is σ = 12012023150424. Its totient is φ = 10010019292000.

The previous prime is 11011021221209. The next prime is 11011021221223. The reversal of 11011021221211 is 11212212011011.

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 11011021221211 - 2¹ = 11011021221209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11011021821211) 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, 500500964590 + ... + 500500964611.

It is an arithmetic number, because the mean of its divisors is an integer number (3003005787606).

Almost surely, 2^{11011021221211} is an apocalyptic number.

11011021221211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11011021221211 is a deficient number, since it is larger than the sum of its proper divisors (1001001929213).

11011021221211 is a wasteful number, since it uses less digits than its factorization.

11011021221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001001929212.

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

Adding to 11011021221211 its reverse (11212212011011), we get a palindrome (22223233232222).

The spelling of 11011021221211 in words is "eleven trillion, eleven billion, twenty-one million, two hundred twenty-one thousand, two hundred eleven".