2111221212 has 24 divisors (see below), whose sum is σ = 4931786496. Its totient is φ = 702939888.

The previous prime is 2111221207. The next prime is 2111221213. The reversal of 2111221212 is 2121221112.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2111221191 and 2111221200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111221213) 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, 89028 + ... + 110219.

It is an arithmetic number, because the mean of its divisors is an integer number (205491104).

Almost surely, 2^2111221212 is an apocalyptic number.

It is an amenable number.

2111221212 is an abundant number, since it is smaller than the sum of its proper divisors (2820565284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2111221212 is a wasteful number, since it uses less digits than its factorization.

2111221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200137 (or 200135 counting only the distinct ones).

The product of its digits is 32, while the sum is 15.

The square root of 2111221212 is about 45948.0272917130. The cubic root of 2111221212 is about 1282.8560112693.

Adding to 2111221212 its reverse (2121221112), we get a palindrome (4232442324).

It can be divided in two parts, 21112 and 21212, that added together give a palindrome (42324).

The spelling of 2111221212 in words is "two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twelve".