2011123045 has 4 divisors (see below), whose sum is σ = 2413347660. Its totient is φ = 1608898432.

The previous prime is 2011123027. The next prime is 2011123061. The reversal of 2011123045 is 5403211102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 243172836 + 1767950209 = 15594^2 + 42047^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011123045 - 2¹⁹ = 2010598757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201112300 + ... + 201112309.

It is an arithmetic number, because the mean of its divisors is an integer number (603336915).

Almost surely, 2^2011123045 is an apocalyptic number.

It is an amenable number.

2011123045 is a deficient number, since it is larger than the sum of its proper divisors (402224615).

2011123045 is an equidigital number, since it uses as much as digits as its factorization.

2011123045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402224614.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2011123045 is about 44845.5465458946. The cubic root of 2011123045 is about 1262.2524263099.

Adding to 2011123045 its reverse (5403211102), we get a palindrome (7414334147).

The spelling of 2011123045 in words is "two billion, eleven million, one hundred twenty-three thousand, forty-five".