109218921913 has 2 divisors, whose sum is σ = 109218921914. Its totient is φ = 109218921912.

The previous prime is 109218921907. The next prime is 109218921919. The reversal of 109218921913 is 319129812901.

It is a balanced prime because it is at equal distance from previous prime (109218921907) and next prime (109218921919).

It can be written as a sum of positive squares in only one way, i.e., 74827961209 + 34390960704 = 273547^2 + 185448^2 .

It is a cyclic number.

It is not a de Polignac number, because 109218921913 - 2⁵ = 109218921881 is a prime.

It is not a weakly prime, because it can be changed into another prime (109218921919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54609460956 + 54609460957.

It is an arithmetic number, because the mean of its divisors is an integer number (54609460957).

Almost surely, 2^109218921913 is an apocalyptic number.

It is an amenable number.

109218921913 is a deficient number, since it is larger than the sum of its proper divisors (1).

109218921913 is an equidigital number, since it uses as much as digits as its factorization.

109218921913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 46.

The spelling of 109218921913 in words is "one hundred nine billion, two hundred eighteen million, nine hundred twenty-one thousand, nine hundred thirteen".