1221012303233 has 2 divisors, whose sum is σ = 1221012303234. Its totient is φ = 1221012303232.

The previous prime is 1221012303229. The next prime is 1221012303241. The reversal of 1221012303233 is 3323032101221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 738588985744 + 482423317489 = 859412^2 + 694567^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221012303233 - 2² = 1221012303229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221012303199 and 1221012303208.

It is not a weakly prime, because it can be changed into another prime (1221012303223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610506151616 + 610506151617.

It is an arithmetic number, because the mean of its divisors is an integer number (610506151617).

Almost surely, 2^{1221012303233} is an apocalyptic number.

It is an amenable number.

1221012303233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221012303233 is an equidigital number, since it uses as much as digits as its factorization.

1221012303233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1221012303233 its reverse (3323032101221), we get a palindrome (4544044404454).

The spelling of 1221012303233 in words is "one trillion, two hundred twenty-one billion, twelve million, three hundred three thousand, two hundred thirty-three".