1211311222 has 16 divisors (see below), whose sum is σ = 1984618944. Its totient is φ = 549909000.

The previous prime is 1211311219. The next prime is 1211311259. The reversal of 1211311222 is 2221131121.

It is a junction number, because it is equal to n+sod(n) for n = 1211311196 and 1211311205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16104 + ... + 51787.

It is an arithmetic number, because the mean of its divisors is an integer number (124038684).

Almost surely, 2^1211311222 is an apocalyptic number.

1211311222 is a deficient number, since it is larger than the sum of its proper divisors (773307722).

1211311222 is a wasteful number, since it uses less digits than its factorization.

1211311222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68715.

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

The square root of 1211311222 is about 34803.8966496569. The cubic root of 1211311222 is about 1065.9870127145.

Adding to 1211311222 its reverse (2221131121), we get a palindrome (3432442343).

The spelling of 1211311222 in words is "one billion, two hundred eleven million, three hundred eleven thousand, two hundred twenty-two".