102021419 has 2 divisors, whose sum is σ = 102021420. Its totient is φ = 102021418.

The previous prime is 102021389. The next prime is 102021421. The reversal of 102021419 is 914120201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102021419 - 2¹⁶ = 101955883 is a prime.

It is a super-2 number, since 2×102021419² = 20816739869547122, which contains 22 as substring.

Together with 102021421, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102021419.

It is not a weakly prime, because it can be changed into another prime (102021719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010709 + 51010710.

It is an arithmetic number, because the mean of its divisors is an integer number (51010710).

Almost surely, 2^102021419 is an apocalyptic number.

102021419 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021419 is an equidigital number, since it uses as much as digits as its factorization.

102021419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 102021419 is about 10100.5652812108. The cubic root of 102021419 is about 467.2655753208.

The spelling of 102021419 in words is "one hundred two million, twenty-one thousand, four hundred nineteen".