1222222120109 has 4 divisors (see below), whose sum is σ = 1222611738204. Its totient is φ = 1221832502016.

The previous prime is 1222222120099. The next prime is 1222222120151. The reversal of 1222222120109 is 9010212222221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 959998242025 + 262223878084 = 979795^2 + 512078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222222120109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222222120169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194804342 + ... + 194810615.

It is an arithmetic number, because the mean of its divisors is an integer number (305652934551).

Almost surely, 2^{1222222120109} is an apocalyptic number.

It is an amenable number.

1222222120109 is a deficient number, since it is larger than the sum of its proper divisors (389618095).

1222222120109 is an equidigital number, since it uses as much as digits as its factorization.

1222222120109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389618094.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 1222222120109 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred twenty thousand, one hundred nine".