1213203331 has 2 divisors, whose sum is σ = 1213203332. Its totient is φ = 1213203330.

The previous prime is 1213203311. The next prime is 1213203353. The reversal of 1213203331 is 1333023121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213203331 - 2⁹ = 1213202819 is a prime.

It is a super-2 number, since 2×1213203331² = 2943724644698991122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213203299 and 1213203308.

It is not a weakly prime, because it can be changed into another prime (1213203311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606601665 + 606601666.

It is an arithmetic number, because the mean of its divisors is an integer number (606601666).

Almost surely, 2^1213203331 is an apocalyptic number.

1213203331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213203331 is an equidigital number, since it uses as much as digits as its factorization.

1213203331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1213203331 is about 34831.0684734190. The cubic root of 1213203331 is about 1066.5417598640.

Adding to 1213203331 its reverse (1333023121), we get a palindrome (2546226452).

The spelling of 1213203331 in words is "one billion, two hundred thirteen million, two hundred three thousand, three hundred thirty-one".