102020112109 has 2 divisors, whose sum is σ = 102020112110. Its totient is φ = 102020112108.

The previous prime is 102020112083. The next prime is 102020112149. The reversal of 102020112109 is 901211020201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90270202500 + 11749909609 = 300450^2 + 108397^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020112109 - 2¹⁵ = 102020079341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020112149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010056054 + 51010056055.

It is an arithmetic number, because the mean of its divisors is an integer number (51010056055).

Almost surely, 2^102020112109 is an apocalyptic number.

It is an amenable number.

102020112109 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020112109 is an equidigital number, since it uses as much as digits as its factorization.

102020112109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 102020112109 in words is "one hundred two billion, twenty million, one hundred twelve thousand, one hundred nine".