2801080921 has 6 divisors (see below), whose sum is σ = 2928162650. Its totient is φ = 2679294288.

The previous prime is 2801080889. The next prime is 2801080943. The reversal of 2801080921 is 1290801082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1586906896 + 1214174025 = 39836^2 + 34845^2 .

It is not a de Polignac number, because 2801080921 - 2⁵ = 2801080889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2801086921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2646996 + ... + 2648053.

Almost surely, 2^2801080921 is an apocalyptic number.

It is an amenable number.

2801080921 is a deficient number, since it is larger than the sum of its proper divisors (127081729).

2801080921 is an equidigital number, since it uses as much as digits as its factorization.

2801080921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295095 (or 5295072 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 2801080921 is about 52925.2389791487. The cubic root of 2801080921 is about 1409.6410938693.

The spelling of 2801080921 in words is "two billion, eight hundred one million, eighty thousand, nine hundred twenty-one".