11212200021 has 16 divisors (see below), whose sum is σ = 16749430848. Its totient is φ = 6611616000.

The previous prime is 11212200019. The next prime is 11212200047. The reversal of 11212200021 is 12000221211.

It is not a de Polignac number, because 11212200021 - 2¹ = 11212200019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212200061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4590180 + ... + 4592621.

It is an arithmetic number, because the mean of its divisors is an integer number (1046839428).

Almost surely, 2^11212200021 is an apocalyptic number.

11212200021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11212200021 is a deficient number, since it is larger than the sum of its proper divisors (5537230827).

11212200021 is a wasteful number, since it uses less digits than its factorization.

11212200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9182852.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11212200021 its reverse (12000221211), we get a palindrome (23212421232).

The spelling of 11212200021 in words is "eleven billion, two hundred twelve million, two hundred thousand, twenty-one".