212122022111 has 8 divisors (see below), whose sum is σ = 216657508800. Its totient is φ = 207587462688.

The previous prime is 212122022089. The next prime is 212122022117. The reversal of 212122022111 is 111220221212.

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-212122022111 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 212122022111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212122022117) 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, 240785 + ... + 694421.

It is an arithmetic number, because the mean of its divisors is an integer number (27082188600).

Almost surely, 2^212122022111 is an apocalyptic number.

212122022111 is a deficient number, since it is larger than the sum of its proper divisors (4535486689).

212122022111 is an equidigital number, since it uses as much as digits as its factorization.

212122022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463633.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212122022111 its reverse (111220221212), we get a palindrome (323342243323).

The spelling of 212122022111 in words is "two hundred twelve billion, one hundred twenty-two million, twenty-two thousand, one hundred eleven".