109218921907 has 2 divisors, whose sum is σ = 109218921908. Its totient is φ = 109218921906.

The previous prime is 109218921881. The next prime is 109218921913. The reversal of 109218921907 is 709129812901.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109218921907 is a prime.

It is not a weakly prime, because it can be changed into another prime (109218921307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54609460953 + 54609460954.

It is an arithmetic number, because the mean of its divisors is an integer number (54609460954).

Almost surely, 2^109218921907 is an apocalyptic number.

109218921907 is a deficient number, since it is larger than the sum of its proper divisors (1).

109218921907 is an equidigital number, since it uses as much as digits as its factorization.

109218921907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 49.

The spelling of 109218921907 in words is "one hundred nine billion, two hundred eighteen million, nine hundred twenty-one thousand, nine hundred seven".