102130019 has 4 divisors (see below), whose sum is σ = 102741744. Its totient is φ = 101518296.

The previous prime is 102129991. The next prime is 102130037. The reversal of 102130019 is 910031201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910031201 = 19 ⋅47896379.

It is a cyclic number.

It is not a de Polignac number, because 102130019 - 2¹⁶ = 102064483 is a prime.

It is a super-2 number, since 2×102130019² = 20861081561880722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102129979 and 102130006.

It is not an unprimeable number, because it can be changed into a prime (102130069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305612 + ... + 305945.

It is an arithmetic number, because the mean of its divisors is an integer number (25685436).

Almost surely, 2^102130019 is an apocalyptic number.

102130019 is a deficient number, since it is larger than the sum of its proper divisors (611725).

102130019 is an equidigital number, since it uses as much as digits as its factorization.

102130019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611724.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 102130019 is about 10105.9397880652. The cubic root of 102130019 is about 467.4313151784.

The spelling of 102130019 in words is "one hundred two million, one hundred thirty thousand, nineteen".