2121500045 has 8 divisors (see below), whose sum is σ = 2909485824. Its totient is φ = 1454742864.

The previous prime is 2121500011. The next prime is 2121500047. The reversal of 2121500045 is 5400051212.

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 2121500045 - 2⁶ = 2121499981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121500047) 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, 30307109 + ... + 30307178.

It is an arithmetic number, because the mean of its divisors is an integer number (363685728).

Almost surely, 2^2121500045 is an apocalyptic number.

It is an amenable number.

2121500045 is a deficient number, since it is larger than the sum of its proper divisors (787985779).

2121500045 is an equidigital number, since it uses as much as digits as its factorization.

2121500045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60614299.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2121500045 is about 46059.7443002021. The cubic root of 2121500045 is about 1284.9345745328.

Adding to 2121500045 its reverse (5400051212), we get a palindrome (7521551257).

The spelling of 2121500045 in words is "two billion, one hundred twenty-one million, five hundred thousand, forty-five".