2102120545 has 8 divisors (see below), whose sum is σ = 2882908224. Its totient is φ = 1441454064.

The previous prime is 2102120519. The next prime is 2102120549. The reversal of 2102120545 is 5450212012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2102120545 - 2⁵ = 2102120513 is a prime.

It is a super-2 number, since 2×2102120545² = 8837821571422194050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2102120549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30030259 + ... + 30030328.

It is an arithmetic number, because the mean of its divisors is an integer number (360363528).

Almost surely, 2^2102120545 is an apocalyptic number.

It is an amenable number.

2102120545 is a deficient number, since it is larger than the sum of its proper divisors (780787679).

2102120545 is an equidigital number, since it uses as much as digits as its factorization.

2102120545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60060599.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2102120545 is about 45848.8881544580. Note that the first 3 decimals coincide. The cubic root of 2102120545 is about 1281.0100558172.

Adding to 2102120545 its reverse (5450212012), we get a palindrome (7552332557).

The spelling of 2102120545 in words is "two billion, one hundred two million, one hundred twenty thousand, five hundred forty-five".