109398825421 has 2 divisors, whose sum is σ = 109398825422. Its totient is φ = 109398825420.

The previous prime is 109398825413. The next prime is 109398825443. The reversal of 109398825421 is 124528893901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88929800521 + 20469024900 = 298211^2 + 143070^2 .

It is a cyclic number.

It is not a de Polignac number, because 109398825421 - 2³ = 109398825413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109398825451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54699412710 + 54699412711.

It is an arithmetic number, because the mean of its divisors is an integer number (54699412711).

Almost surely, 2^109398825421 is an apocalyptic number.

It is an amenable number.

109398825421 is a deficient number, since it is larger than the sum of its proper divisors (1).

109398825421 is an equidigital number, since it uses as much as digits as its factorization.

109398825421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 109398825421 in words is "one hundred nine billion, three hundred ninety-eight million, eight hundred twenty-five thousand, four hundred twenty-one".