212220121111 has 8 divisors (see below), whose sum is σ = 212521310064. Its totient is φ = 211919002560.

The previous prime is 212220121051. The next prime is 212220121199. The reversal of 212220121111 is 111121022212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212220121111 - 2¹³ = 212220112919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220121411) 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, 9687891 + ... + 9709771.

It is an arithmetic number, because the mean of its divisors is an integer number (26565163758).

Almost surely, 2^212220121111 is an apocalyptic number.

212220121111 is a deficient number, since it is larger than the sum of its proper divisors (301188953).

212220121111 is a wasteful number, since it uses less digits than its factorization.

212220121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35201.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212220121111 its reverse (111121022212), we get a palindrome (323341143323).

The spelling of 212220121111 in words is "two hundred twelve billion, two hundred twenty million, one hundred twenty-one thousand, one hundred eleven".