212021123111 has 8 divisors (see below), whose sum is σ = 242403323424. Its totient is φ = 181662289920.

The previous prime is 212021123087. The next prime is 212021123183. The reversal of 212021123111 is 111321120212.

It is a happy number.

212021123111 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021123111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212021123111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021123411) 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 7 ways as a sum of consecutive naturals, for example, 5822330 + ... + 5858631.

It is an arithmetic number, because the mean of its divisors is an integer number (30300415428).

Almost surely, 2^212021123111 is an apocalyptic number.

212021123111 is a deficient number, since it is larger than the sum of its proper divisors (30382200313).

212021123111 is a wasteful number, since it uses less digits than its factorization.

212021123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11683561.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 212021123111 its reverse (111321120212), we get a palindrome (323342243323).

The spelling of 212021123111 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-three thousand, one hundred eleven".