1221012303207 has 4 divisors (see below), whose sum is σ = 1628016404280. Its totient is φ = 814008202136.

The previous prime is 1221012303169. The next prime is 1221012303211. The reversal of 1221012303207 is 7023032101221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1221012303207 - 2¹⁶ = 1221012237671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221012303257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203502050532 + ... + 203502050537.

It is an arithmetic number, because the mean of its divisors is an integer number (407004101070).

Almost surely, 2^{1221012303207} is an apocalyptic number.

1221012303207 is a deficient number, since it is larger than the sum of its proper divisors (407004101073).

1221012303207 is an equidigital number, since it uses as much as digits as its factorization.

1221012303207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407004101072.

The product of its (nonzero) digits is 1008, while the sum is 24.

Adding to 1221012303207 its reverse (7023032101221), we get a palindrome (8244044404428).

The spelling of 1221012303207 in words is "one trillion, two hundred twenty-one billion, twelve million, three hundred three thousand, two hundred seven".