1019200919091 has 16 divisors (see below), whose sum is σ = 1429621401600. Its totient is φ = 644918092448.

The previous prime is 1019200919089. The next prime is 1019200919101. The reversal of 1019200919091 is 1909190029101.

It is not a de Polignac number, because 1019200919091 - 2¹ = 1019200919089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1019200919021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99274131 + ... + 99284396.

It is an arithmetic number, because the mean of its divisors is an integer number (89351337600).

Almost surely, 2^{1019200919091} is an apocalyptic number.

1019200919091 is a deficient number, since it is larger than the sum of its proper divisors (410420482509).

1019200919091 is a wasteful number, since it uses less digits than its factorization.

1019200919091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198558618.

The product of its (nonzero) digits is 13122, while the sum is 42.

The spelling of 1019200919091 in words is "one trillion, nineteen billion, two hundred million, nine hundred nineteen thousand, ninety-one".