1020123019 has 2 divisors, whose sum is σ = 1020123020. Its totient is φ = 1020123018.

The previous prime is 1020123017. The next prime is 1020123067. The reversal of 1020123019 is 9103210201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1020123019 - 2¹ = 1020123017 is a prime.

It is a super-2 number, since 2×1020123019² = 2081301947787348722, which contains 22 as substring.

Together with 1020123017, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1020122987 and 1020123005.

It is not a weakly prime, because it can be changed into another prime (1020123017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510061509 + 510061510.

It is an arithmetic number, because the mean of its divisors is an integer number (510061510).

Almost surely, 2^1020123019 is an apocalyptic number.

1020123019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020123019 is an equidigital number, since it uses as much as digits as its factorization.

1020123019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1020123019 is about 31939.3647244274. The cubic root of 1020123019 is about 1006.6631764690.

The spelling of 1020123019 in words is "one billion, twenty million, one hundred twenty-three thousand, nineteen".