2212121211 has 8 divisors (see below), whose sum is σ = 2950133760. Its totient is φ = 1474428072.

The previous prime is 2212121203. The next prime is 2212121237. The reversal of 2212121211 is 1121212122.

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

It is not a de Polignac number, because 2212121211 - 2³ = 2212121203 is a prime.

It is a super-2 number, since 2×2212121211² = 9786960504312213042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2212111211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63195 + ... + 91748.

It is an arithmetic number, because the mean of its divisors is an integer number (368766720).

Almost surely, 2^2212121211 is an apocalyptic number.

2212121211 is a deficient number, since it is larger than the sum of its proper divisors (738012549).

2212121211 is a wasteful number, since it uses less digits than its factorization.

2212121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159705.

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

The square root of 2212121211 is about 47033.1926515732. The cubic root of 2212121211 is about 1302.9756709356.

Adding to 2212121211 its reverse (1121212122), we get a palindrome (3333333333).

It can be divided in two parts, 221212121 and 1, that added together give a palindrome (221212122).

The spelling of 2212121211 in words is "two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred eleven".