1321212113233 has 2 divisors, whose sum is σ = 1321212113234. Its totient is φ = 1321212113232.

The previous prime is 1321212113189. The next prime is 1321212113311. The reversal of 1321212113233 is 3323112121231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 694410555969 + 626801557264 = 833313^2 + 791708^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321212113233 - 2⁹ = 1321212112721 is a prime.

It is a super-2 number, since 2×1321212113233² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321212113198 and 1321212113207.

It is not a weakly prime, because it can be changed into another prime (1321212113033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660606056616 + 660606056617.

It is an arithmetic number, because the mean of its divisors is an integer number (660606056617).

Almost surely, 2^{1321212113233} is an apocalyptic number.

It is an amenable number.

1321212113233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321212113233 is an equidigital number, since it uses as much as digits as its factorization.

1321212113233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

Adding to 1321212113233 its reverse (3323112121231), we get a palindrome (4644324234464).

The spelling of 1321212113233 in words is "one trillion, three hundred twenty-one billion, two hundred twelve million, one hundred thirteen thousand, two hundred thirty-three".