102020208919 has 2 divisors, whose sum is σ = 102020208920. Its totient is φ = 102020208918.

The previous prime is 102020208893. The next prime is 102020209013. The reversal of 102020208919 is 919802020201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102020208919 - 2¹⁵ = 102020176151 is a prime.

It is a super-2 number, since 2×102020208919² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102020268919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010104459 + 51010104460.

It is an arithmetic number, because the mean of its divisors is an integer number (51010104460).

Almost surely, 2^102020208919 is an apocalyptic number.

102020208919 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020208919 is an equidigital number, since it uses as much as digits as its factorization.

102020208919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 102020208919 in words is "one hundred two billion, twenty million, two hundred eight thousand, nine hundred nineteen".