102001001019 has 4 divisors (see below), whose sum is σ = 136001334696. Its totient is φ = 68000667344.

The previous prime is 102001000999. The next prime is 102001001057. The reversal of 102001001019 is 910100100201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102001001019 - 2²³ = 101992612411 is a prime.

It is a super-2 number, since 2×102001001019² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102001000989 and 102001001007.

It is not an unprimeable number, because it can be changed into a prime (102001001819) 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, 17000166834 + ... + 17000166839.

It is an arithmetic number, because the mean of its divisors is an integer number (34000333674).

Almost surely, 2^102001001019 is an apocalyptic number.

102001001019 is a deficient number, since it is larger than the sum of its proper divisors (34000333677).

102001001019 is an equidigital number, since it uses as much as digits as its factorization.

102001001019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34000333676.

The product of its (nonzero) digits is 18, while the sum is 15.

The spelling of 102001001019 in words is "one hundred two billion, one million, one thousand, nineteen".