1212212 has 6 divisors (see below), whose sum is σ = 2121378. Its totient is φ = 606104.

The previous prime is 1212199. The next prime is 1212221. The reversal of 1212212 is 2122121.

It is a happy number.

1212212 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in only one way, i.e., 1196836 + 15376 = 1094^2 + 124^2 .

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 = 1212193 and 1212202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151523 + ... + 151530.

It is an arithmetic number, because the mean of its divisors is an integer number (353563).

2^1212212 is an apocalyptic number.

It is an amenable number.

1212212 is a deficient number, since it is larger than the sum of its proper divisors (909166).

1212212 is a wasteful number, since it uses less digits than its factorization.

1212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303057 (or 303055 counting only the distinct ones).

The product of its digits is 16, while the sum is 11.

The square root of 1212212 is about 1101.0049954473. The cubic root of 1212212 is about 106.6251183670.

Subtracting from 1212212 its sum of digits (11), we obtain a square (1212201 = 1101²).

Adding to 1212212 its reverse (2122121), we get a palindrome (3334333).

Subtracting 1212212 from its reverse (2122121), we obtain a palindrome (909909).

The spelling of 1212212 in words is "one million, two hundred twelve thousand, two hundred twelve".