210123019 has 2 divisors, whose sum is σ = 210123020. Its totient is φ = 210123018.

The previous prime is 210123007. The next prime is 210123029. The reversal of 210123019 is 910321012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210123019 is a prime.

It is a super-2 number, since 2×210123019² = 88303366227348722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 210122987 and 210123005.

It is not a weakly prime, because it can be changed into another prime (210123029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061509 + 105061510.

It is an arithmetic number, because the mean of its divisors is an integer number (105061510).

Almost surely, 2^210123019 is an apocalyptic number.

210123019 is a deficient number, since it is larger than the sum of its proper divisors (1).

210123019 is an equidigital number, since it uses as much as digits as its factorization.

210123019 is an evil number, because the sum of its binary digits is even.

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

The square root of 210123019 is about 14495.6206835030. The cubic root of 210123019 is about 594.5082385458.

The spelling of 210123019 in words is "two hundred ten million, one hundred twenty-three thousand, nineteen".