11212212021 has 8 divisors (see below), whose sum is σ = 14962475040. Its totient is φ = 7468378512.

The previous prime is 11212212013. The next prime is 11212212023. The reversal of 11212212021 is 12021221211.

11212212021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11212212021 - 2³ = 11212212013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212212023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1603306 + ... + 1610283.

It is an arithmetic number, because the mean of its divisors is an integer number (1870309380).

Almost surely, 2^11212212021 is an apocalyptic number.

It is an amenable number.

11212212021 is a deficient number, since it is larger than the sum of its proper divisors (3750263019).

11212212021 is a wasteful number, since it uses less digits than its factorization.

11212212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214755.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11212212021 its reverse (12021221211), we get a palindrome (23233433232).

The spelling of 11212212021 in words is "eleven billion, two hundred twelve million, two hundred twelve thousand, twenty-one".