1221220102247 has 2 divisors, whose sum is σ = 1221220102248. Its totient is φ = 1221220102246.

The previous prime is 1221220102231. The next prime is 1221220102279. The reversal of 1221220102247 is 7422010221221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221220102247 - 2⁴ = 1221220102231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221220102747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610610051123 + 610610051124.

It is an arithmetic number, because the mean of its divisors is an integer number (610610051124).

Almost surely, 2^{1221220102247} is an apocalyptic number.

1221220102247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221220102247 is an equidigital number, since it uses as much as digits as its factorization.

1221220102247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 26.

Adding to 1221220102247 its reverse (7422010221221), we get a palindrome (8643230323468).

The spelling of 1221220102247 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, one hundred two thousand, two hundred forty-seven".