1211233313 has 2 divisors, whose sum is σ = 1211233314. Its totient is φ = 1211233312.

The previous prime is 1211233279. The next prime is 1211233321. The reversal of 1211233313 is 3133321121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1080634129 + 130599184 = 32873^2 + 11428^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211233313 - 2⁶ = 1211233249 is a prime.

It is a super-2 number, since 2×1211233313² = 2934172277041911938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1211233913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605616656 + 605616657.

It is an arithmetic number, because the mean of its divisors is an integer number (605616657).

Almost surely, 2^1211233313 is an apocalyptic number.

It is an amenable number.

1211233313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211233313 is an equidigital number, since it uses as much as digits as its factorization.

1211233313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 20.

The square root of 1211233313 is about 34802.7773748016. Note that the first 3 decimals coincide. The cubic root of 1211233313 is about 1065.9641582074.

Adding to 1211233313 its reverse (3133321121), we get a palindrome (4344554434).

The spelling of 1211233313 in words is "one billion, two hundred eleven million, two hundred thirty-three thousand, three hundred thirteen".