1001019201091 has 12 divisors (see below), whose sum is σ = 1238792994192. Its totient is φ = 792015191136.

The previous prime is 1001019201079. The next prime is 1001019201121. The reversal of 1001019201091 is 1901029101001.

It is not a de Polignac number, because 1001019201091 - 2¹¹ = 1001019199043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001019201691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423083856 + ... + 423086221.

It is an arithmetic number, because the mean of its divisors is an integer number (103232749516).

Almost surely, 2^{1001019201091} is an apocalyptic number.

1001019201091 is a deficient number, since it is larger than the sum of its proper divisors (237773793101).

1001019201091 is an equidigital number, since it uses as much as digits as its factorization.

1001019201091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846170110 (or 846170097 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 25.

The spelling of 1001019201091 in words is "one trillion, one billion, nineteen million, two hundred one thousand, ninety-one".