1121223212 has 24 divisors (see below), whose sum is σ = 2079294000. Its totient is φ = 527535936.

The previous prime is 1121223199. The next prime is 1121223223. The reversal of 1121223212 is 2123221211.

It is a super-2 number, since 2×1121223212² = 2514282982255193888, which contains 22 as substring.

It is an unprimeable number.

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, 38183 + ... + 60830.

It is an arithmetic number, because the mean of its divisors is an integer number (86637250).

Almost surely, 2^1121223212 is an apocalyptic number.

It is an amenable number.

1121223212 is a deficient number, since it is larger than the sum of its proper divisors (958070788).

1121223212 is a wasteful number, since it uses less digits than its factorization.

1121223212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99185 (or 99183 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 1121223212 is about 33484.6712989690. The cubic root of 1121223212 is about 1038.8767495499.

Adding to 1121223212 its reverse (2123221211), we get a palindrome (3244444423).

The spelling of 1121223212 in words is "one billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred twelve".