1121223213 has 12 divisors (see below), whose sum is σ = 1766776128. Its totient is φ = 679529160.

The previous prime is 1121223199. The next prime is 1121223223. The reversal of 1121223213 is 3123221211.

It is not a de Polignac number, because 1121223213 - 2¹² = 1121219117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121223223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5662645 + ... + 5662842.

It is an arithmetic number, because the mean of its divisors is an integer number (147231344).

Almost surely, 2^1121223213 is an apocalyptic number.

It is an amenable number.

1121223213 is a deficient number, since it is larger than the sum of its proper divisors (645552915).

1121223213 is a wasteful number, since it uses less digits than its factorization.

1121223213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11325504 (or 11325501 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1121223213 is about 33484.6713139012. The cubic root of 1121223213 is about 1038.8767498587.

Adding to 1121223213 its reverse (3123221211), we get a palindrome (4244444424).

The spelling of 1121223213 in words is "one billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred thirteen".