1222120019509 has 2 divisors, whose sum is σ = 1222120019510. Its totient is φ = 1222120019508.

The previous prime is 1222120019501. The next prime is 1222120019543. The reversal of 1222120019509 is 9059100212221.

It is an a-pointer prime, because the next prime (1222120019543) can be obtained adding 1222120019509 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1135763381284 + 86356638225 = 1065722^2 + 293865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222120019509 - 2³ = 1222120019501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222120019501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611060009754 + 611060009755.

It is an arithmetic number, because the mean of its divisors is an integer number (611060009755).

Almost surely, 2^{1222120019509} is an apocalyptic number.

It is an amenable number.

1222120019509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222120019509 is an equidigital number, since it uses as much as digits as its factorization.

1222120019509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 34.

The spelling of 1222120019509 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, nineteen thousand, five hundred nine".