212220122111 has 8 divisors (see below), whose sum is σ = 218538636624. Its totient is φ = 205964478720.

The previous prime is 212220122053. The next prime is 212220122141. The reversal of 212220122111 is 111221022212.

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-212220122111 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 212220122111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220122141) 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, 15710930 + ... + 15724431.

It is an arithmetic number, because the mean of its divisors is an integer number (27317329578).

Almost surely, 2^212220122111 is an apocalyptic number.

212220122111 is a deficient number, since it is larger than the sum of its proper divisors (6318514513).

212220122111 is a wasteful number, since it uses less digits than its factorization.

212220122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31435561.

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

Adding to 212220122111 its reverse (111221022212), we get a palindrome (323441144323).

The spelling of 212220122111 in words is "two hundred twelve billion, two hundred twenty million, one hundred twenty-two thousand, one hundred eleven".