2120145305 has 32 divisors (see below), whose sum is σ = 2715897600. Its totient is φ = 1584306432.

The previous prime is 2120145241. The next prime is 2120145317. The reversal of 2120145305 is 5035410212.

It is a cyclic number.

It is not a de Polignac number, because 2120145305 - 2⁶ = 2120145241 is a prime.

It is a super-2 number, since 2×2120145305² = 8990032228627086050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3806087 + ... + 3806643.

It is an arithmetic number, because the mean of its divisors is an integer number (84871800).

Almost surely, 2^2120145305 is an apocalyptic number.

It is an amenable number.

2120145305 is a deficient number, since it is larger than the sum of its proper divisors (595752295).

2120145305 is a wasteful number, since it uses less digits than its factorization.

2120145305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2120145305 is about 46045.0356173171. The cubic root of 2120145305 is about 1284.6610066336.

Adding to 2120145305 its reverse (5035410212), we get a palindrome (7155555517).

The spelling of 2120145305 in words is "two billion, one hundred twenty million, one hundred forty-five thousand, three hundred five".