1223312211 has 48 divisors (see below), whose sum is σ = 1953256032. Its totient is φ = 731635200.

The previous prime is 1223312159. The next prime is 1223312213. The reversal of 1223312211 is 1122133221.

1223312211 is a `hidden beast` number, since 122 + 331 + 2 + 211 = 666.

It is not a de Polignac number, because 1223312211 - 2⁶ = 1223312147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223312213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4174981 + ... + 4175273.

It is an arithmetic number, because the mean of its divisors is an integer number (40692834).

Almost surely, 2^1223312211 is an apocalyptic number.

1223312211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1223312211 is a deficient number, since it is larger than the sum of its proper divisors (729943821).

1223312211 is a wasteful number, since it uses less digits than its factorization.

1223312211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 721 counting only the distinct ones).

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

The square root of 1223312211 is about 34975.8804177965. The cubic root of 1223312211 is about 1069.4958497833.

Adding to 1223312211 its reverse (1122133221), we get a palindrome (2345445432).

The spelling of 1223312211 in words is "one billion, two hundred twenty-three million, three hundred twelve thousand, two hundred eleven".