1211112213 has 8 divisors (see below), whose sum is σ = 1630494528. Its totient is φ = 799569024.

The previous prime is 1211112163. The next prime is 1211112229. The reversal of 1211112213 is 3122111121.

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

It is not a de Polignac number, because 1211112213 - 2¹⁰ = 1211111189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211112192 and 1211112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211112233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1959420 + ... + 1960037.

It is an arithmetic number, because the mean of its divisors is an integer number (203811816).

Almost surely, 2^1211112213 is an apocalyptic number.

It is an amenable number.

1211112213 is a deficient number, since it is larger than the sum of its proper divisors (419382315).

1211112213 is a wasteful number, since it uses less digits than its factorization.

1211112213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3919563.

The product of its digits is 24, while the sum is 15.

The square root of 1211112213 is about 34801.0375276370. The cubic root of 1211112213 is about 1065.9286317291.

Adding to 1211112213 its reverse (3122111121), we get a palindrome (4333223334).

The spelling of 1211112213 in words is "one billion, two hundred eleven million, one hundred twelve thousand, two hundred thirteen".