1223212133 has 16 divisors (see below), whose sum is σ = 1442448000. Its totient is φ = 1022623680.

The previous prime is 1223212127. The next prime is 1223212139. The reversal of 1223212133 is 3312123221.

It is an interprime number because it is at equal distance from previous prime (1223212127) and next prime (1223212139).

It is not a de Polignac number, because 1223212133 - 2¹⁸ = 1222949989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223212139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22568 + ... + 54366.

It is an arithmetic number, because the mean of its divisors is an integer number (90153000).

Almost surely, 2^1223212133 is an apocalyptic number.

1223212133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1223212133 is a deficient number, since it is larger than the sum of its proper divisors (219235867).

1223212133 is a wasteful number, since it uses less digits than its factorization.

1223212133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32092.

The product of its digits is 432, while the sum is 20.

The square root of 1223212133 is about 34974.4497169005. The cubic root of 1223212133 is about 1069.4666841777.

Adding to 1223212133 its reverse (3312123221), we get a palindrome (4535335354).

The spelling of 1223212133 in words is "one billion, two hundred twenty-three million, two hundred twelve thousand, one hundred thirty-three".