11100021211 has 4 divisors (see below), whose sum is σ = 11101231624. Its totient is φ = 11098810800.

The previous prime is 11100021203. The next prime is 11100021223. The reversal of 11100021211 is 11212000111.

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 11100021211 - 2³ = 11100021203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11100021241) 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, 591345 + ... + 609826.

It is an arithmetic number, because the mean of its divisors is an integer number (2775307906).

Almost surely, 2^11100021211 is an apocalyptic number.

11100021211 is a deficient number, since it is larger than the sum of its proper divisors (1210413).

11100021211 is an equidigital number, since it uses as much as digits as its factorization.

11100021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210412.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11100021211 its reverse (11212000111), we get a palindrome (22312021322).

The spelling of 11100021211 in words is "eleven billion, one hundred million, twenty-one thousand, two hundred eleven".