1233312121 has 2 divisors, whose sum is σ = 1233312122. Its totient is φ = 1233312120.

The previous prime is 1233312109. The next prime is 1233312127. The reversal of 1233312121 is 1212133321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1076561721 + 156750400 = 32811^2 + 12520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233312121 - 2⁵ = 1233312089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1233312127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616656060 + 616656061.

It is an arithmetic number, because the mean of its divisors is an integer number (616656061).

Almost surely, 2^1233312121 is an apocalyptic number.

It is an amenable number.

1233312121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233312121 is an equidigital number, since it uses as much as digits as its factorization.

1233312121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 1233312121 is about 35118.5438337070. The cubic root of 1233312121 is about 1072.4021267522.

Adding to 1233312121 its reverse (1212133321), we get a palindrome (2445445442).

The spelling of 1233312121 in words is "one billion, two hundred thirty-three million, three hundred twelve thousand, one hundred twenty-one".