11211001221211 has 4 divisors (see below), whose sum is σ = 12230183150424. Its totient is φ = 10191819292000.

The previous prime is 11211001221193. The next prime is 11211001221229. The reversal of 11211001221211 is 11212210011211.

11211001221211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (11211001221193) and next prime (11211001221229).

It is a cyclic number.

It is not a de Polignac number, because 11211001221211 - 2¹³ = 11211001213019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211001221611) 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, 509590964590 + ... + 509590964611.

It is an arithmetic number, because the mean of its divisors is an integer number (3057545787606).

Almost surely, 2^{11211001221211} is an apocalyptic number.

11211001221211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11211001221211 is a deficient number, since it is larger than the sum of its proper divisors (1019181929213).

11211001221211 is a wasteful number, since it uses less digits than its factorization.

11211001221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019181929212.

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

Adding to 11211001221211 its reverse (11212210011211), we get a palindrome (22423211232422).

The spelling of 11211001221211 in words is "eleven trillion, two hundred eleven billion, one million, two hundred twenty-one thousand, two hundred eleven".