2079121091 has 4 divisors (see below), whose sum is σ = 2079232392. Its totient is φ = 2079009792.

The previous prime is 2079121073. The next prime is 2079121123. The reversal of 2079121091 is 1901219702.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1901219702 = 2 ⋅950609851.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2079121091 is a prime.

It is a super-2 number, since 2×2079121091² = 8645489022082060562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2079121021) 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, 20030 + ... + 67523.

It is an arithmetic number, because the mean of its divisors is an integer number (519808098).

Almost surely, 2^2079121091 is an apocalyptic number.

2079121091 is a deficient number, since it is larger than the sum of its proper divisors (111301).

2079121091 is an equidigital number, since it uses as much as digits as its factorization.

2079121091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111300.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 2079121091 is about 45597.3803085221. The cubic root of 2079121091 is about 1276.3210382727.

The spelling of 2079121091 in words is "two billion, seventy-nine million, one hundred twenty-one thousand, ninety-one".