1221227233 has 2 divisors, whose sum is σ = 1221227234. Its totient is φ = 1221227232.

The previous prime is 1221227191. The next prime is 1221227239. The reversal of 1221227233 is 3327221221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1215428769 + 5798464 = 34863^2 + 2408^2 .

It is an emirp because it is prime and its reverse (3327221221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221227233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221227198 and 1221227207.

It is not a weakly prime, because it can be changed into another prime (1221227239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610613616 + 610613617.

It is an arithmetic number, because the mean of its divisors is an integer number (610613617).

Almost surely, 2^1221227233 is an apocalyptic number.

It is an amenable number.

1221227233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221227233 is an equidigital number, since it uses as much as digits as its factorization.

1221227233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 1221227233 is about 34946.0617666712. The cubic root of 1221227233 is about 1068.8878983152.

Adding to 1221227233 its reverse (3327221221), we get a palindrome (4548448454).

The spelling of 1221227233 in words is "one billion, two hundred twenty-one million, two hundred twenty-seven thousand, two hundred thirty-three".