1019191002002 has 16 divisors (see below), whose sum is σ = 1571647231224. Its totient is φ = 495397056000.

The previous prime is 1019191001989. The next prime is 1019191002031. The reversal of 1019191002002 is 2002001919101.

It can be written as a sum of positive squares in 4 ways, for example, as 735476044801 + 283714957201 = 857599^2 + 532649^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22092899 + ... + 22138982.

Almost surely, 2^{1019191002002} is an apocalyptic number.

1019191002002 is a deficient number, since it is larger than the sum of its proper divisors (552456229222).

1019191002002 is a wasteful number, since it uses less digits than its factorization.

1019191002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44232205.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 1019191002002 in words is "one trillion, nineteen billion, one hundred ninety-one million, two thousand, two".