1213020311233 has 2 divisors, whose sum is σ = 1213020311234. Its totient is φ = 1213020311232.

The previous prime is 1213020311207. The next prime is 1213020311311. The reversal of 1213020311233 is 3321130203121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 974658613504 + 238361697729 = 987248^2 + 488223^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213020311233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213020311533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606510155616 + 606510155617.

It is an arithmetic number, because the mean of its divisors is an integer number (606510155617).

Almost surely, 2^{1213020311233} is an apocalyptic number.

It is an amenable number.

1213020311233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213020311233 is an equidigital number, since it uses as much as digits as its factorization.

1213020311233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1213020311233 its reverse (3321130203121), we get a palindrome (4534150514354).

The spelling of 1213020311233 in words is "one trillion, two hundred thirteen billion, twenty million, three hundred eleven thousand, two hundred thirty-three".