1220012220109 has 2 divisors, whose sum is σ = 1220012220110. Its totient is φ = 1220012220108.

The previous prime is 1220012220107. The next prime is 1220012220131. The reversal of 1220012220109 is 9010222100221.

It is an a-pointer prime, because the next prime (1220012220131) can be obtained adding 1220012220109 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1015479444100 + 204532776009 = 1007710^2 + 452253^2 .

It is an emirp because it is prime and its reverse (9010222100221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220012220109 - 2¹ = 1220012220107 is a prime.

Together with 1220012220107, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1220012220109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220012220103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610006110054 + 610006110055.

It is an arithmetic number, because the mean of its divisors is an integer number (610006110055).

Almost surely, 2^{1220012220109} is an apocalyptic number.

It is an amenable number.

1220012220109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220012220109 is an equidigital number, since it uses as much as digits as its factorization.

1220012220109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 1220012220109 in words is "one trillion, two hundred twenty billion, twelve million, two hundred twenty thousand, one hundred nine".