2045120101 has 4 divisors (see below), whose sum is σ = 2045346604. Its totient is φ = 2044893600.

The previous prime is 2045120093. The next prime is 2045120123. The reversal of 2045120101 is 1010215402.

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 1286943876 + 758176225 = 35874^2 + 27535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045120101 - 2³ = 2045120093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045120191) 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 3 ways as a sum of consecutive naturals, for example, 99120 + ... + 117961.

It is an arithmetic number, because the mean of its divisors is an integer number (511336651).

Almost surely, 2^2045120101 is an apocalyptic number.

It is an amenable number.

2045120101 is a deficient number, since it is larger than the sum of its proper divisors (226503).

2045120101 is an equidigital number, since it uses as much as digits as its factorization.

2045120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226502.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 2045120101 is about 45223.0041129512. The cubic root of 2045120101 is about 1269.3253078221.

Adding to 2045120101 its reverse (1010215402), we get a palindrome (3055335503).

The spelling of 2045120101 in words is "two billion, forty-five million, one hundred twenty thousand, one hundred one".