1000090991091 has 8 divisors (see below), whose sum is σ = 1347201610384. Its totient is φ = 659853849600.

The previous prime is 1000090991071. The next prime is 1000090991153. The reversal of 1000090991091 is 1901990900001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1000090991091 - 2⁷ = 1000090990963 is a prime.

It is a super-2 number, since 2×1000090991091² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000090991021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1718369110 + ... + 1718369691.

It is an arithmetic number, because the mean of its divisors is an integer number (168400201298).

Almost surely, 2^{1000090991091} is an apocalyptic number.

1000090991091 is a deficient number, since it is larger than the sum of its proper divisors (347110619293).

1000090991091 is an equidigital number, since it uses as much as digits as its factorization.

1000090991091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436738901.

The product of its (nonzero) digits is 6561, while the sum is 39.

The spelling of 1000090991091 in words is "one trillion, ninety million, nine hundred ninety-one thousand, ninety-one".