212021112011 has 4 divisors (see below), whose sum is σ = 212033576712. Its totient is φ = 212008647312.

The previous prime is 212021111993. The next prime is 212021112019. The reversal of 212021112011 is 110211120212.

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 212021112011 - 2⁶ = 212021111947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021112019) 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, 6206801 + ... + 6240866.

It is an arithmetic number, because the mean of its divisors is an integer number (53008394178).

Almost surely, 2^212021112011 is an apocalyptic number.

212021112011 is a deficient number, since it is larger than the sum of its proper divisors (12464701).

212021112011 is a wasteful number, since it uses less digits than its factorization.

212021112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12464700.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212021112011 its reverse (110211120212), we get a palindrome (322232232223).

The spelling of 212021112011 in words is "two hundred twelve billion, twenty-one million, one hundred twelve thousand, eleven".