1223212733 has 2 divisors, whose sum is σ = 1223212734. Its totient is φ = 1223212732.

The previous prime is 1223212729. The next prime is 1223212751. The reversal of 1223212733 is 3372123221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1119437764 + 103774969 = 33458^2 + 10187^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223212733 - 2² = 1223212729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223212763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611606366 + 611606367.

It is an arithmetic number, because the mean of its divisors is an integer number (611606367).

Almost surely, 2^1223212733 is an apocalyptic number.

It is an amenable number.

1223212733 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223212733 is an equidigital number, since it uses as much as digits as its factorization.

1223212733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 26.

The square root of 1223212733 is about 34974.4582945898. The cubic root of 1223212733 is about 1069.4668590396.

Adding to 1223212733 its reverse (3372123221), we get a palindrome (4595335954).

The spelling of 1223212733 in words is "one billion, two hundred twenty-three million, two hundred twelve thousand, seven hundred thirty-three".