2119105491 has 4 divisors (see below), whose sum is σ = 2825473992. Its totient is φ = 1412736992.

The previous prime is 2119105481. The next prime is 2119105493. The reversal of 2119105491 is 1945019112.

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 2119105491 - 2¹⁰ = 2119104467 is a prime.

It is a super-3 number, since 3×2119105491³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2119105493) 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, 353184246 + ... + 353184251.

It is an arithmetic number, because the mean of its divisors is an integer number (706368498).

Almost surely, 2^2119105491 is an apocalyptic number.

2119105491 is a deficient number, since it is larger than the sum of its proper divisors (706368501).

2119105491 is an equidigital number, since it uses as much as digits as its factorization.

2119105491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706368500.

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 2119105491 is about 46033.7429610063. The cubic root of 2119105491 is about 1284.4509539018.

The spelling of 2119105491 in words is "two billion, one hundred nineteen million, one hundred five thousand, four hundred ninety-one".