1121212213 has 8 divisors (see below), whose sum is σ = 1249165440. Its totient is φ = 997596480.

The previous prime is 1121212187. The next prime is 1121212219. The reversal of 1121212213 is 3122121211.

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-1121212213 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 (1121212219) 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, 1083828 + ... + 1084861.

It is an arithmetic number, because the mean of its divisors is an integer number (156145680).

Almost surely, 2^1121212213 is an apocalyptic number.

It is an amenable number.

1121212213 is a deficient number, since it is larger than the sum of its proper divisors (127953227).

1121212213 is a wasteful number, since it uses less digits than its factorization.

1121212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168747.

The product of its digits is 48, while the sum is 16.

The square root of 1121212213 is about 33484.5070592356. The cubic root of 1121212213 is about 1038.8733524735.

Adding to 1121212213 its reverse (3122121211), we get a palindrome (4243333424).

The spelling of 1121212213 in words is "one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred thirteen".