212210021021111 has 8 divisors (see below), whose sum is σ = 212496922389024. Its totient is φ = 211923151627680.

The previous prime is 212210021021099. The next prime is 212210021021161. The reversal of 212210021021111 is 111120120012212.

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-212210021021111 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 212210021021111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210021021161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5304005 + ... + 21273281.

It is an arithmetic number, because the mean of its divisors is an integer number (26562115298628).

Almost surely, 2^{212210021021111} is an apocalyptic number.

212210021021111 is a deficient number, since it is larger than the sum of its proper divisors (286901367913).

212210021021111 is a wasteful number, since it uses less digits than its factorization.

212210021021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15987241.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 212210021021111 its reverse (111120120012212), we get a palindrome (323330141033323).

The spelling of 212210021021111 in words is "two hundred twelve trillion, two hundred ten billion, twenty-one million, twenty-one thousand, one hundred eleven".