110102020021909 has 2 divisors, whose sum is σ = 110102020021910. Its totient is φ = 110102020021908.

The previous prime is 110102020021907. The next prime is 110102020022021. The reversal of 110102020021909 is 909120020201011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73964248461009 + 36137771560900 = 8600247^2 + 6011470^2 .

It is a cyclic number.

It is not a de Polignac number, because 110102020021909 - 2¹ = 110102020021907 is a prime.

Together with 110102020021907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110102020021907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55051010010954 + 55051010010955.

It is an arithmetic number, because the mean of its divisors is an integer number (55051010010955).

Almost surely, 2^{110102020021909} is an apocalyptic number.

It is an amenable number.

110102020021909 is a deficient number, since it is larger than the sum of its proper divisors (1).

110102020021909 is an equidigital number, since it uses as much as digits as its factorization.

110102020021909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 110102020021909 in words is "one hundred ten trillion, one hundred two billion, twenty million, twenty-one thousand, nine hundred nine".