1220020229609 has 2 divisors, whose sum is σ = 1220020229610. Its totient is φ = 1220020229608.

The previous prime is 1220020229573. The next prime is 1220020229611. The reversal of 1220020229609 is 9069220200221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 648290677225 + 571729552384 = 805165^2 + 756128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220020229609 - 2¹⁶ = 1220020164073 is a prime.

Together with 1220020229611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1220020229629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610010114804 + 610010114805.

It is an arithmetic number, because the mean of its divisors is an integer number (610010114805).

Almost surely, 2^{1220020229609} is an apocalyptic number.

It is an amenable number.

1220020229609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220020229609 is an equidigital number, since it uses as much as digits as its factorization.

1220020229609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 1220020229609 in words is "one trillion, two hundred twenty billion, twenty million, two hundred twenty-nine thousand, six hundred nine".