2120321505 has 8 divisors (see below), whose sum is σ = 3392514432. Its totient is φ = 1130838128.

The previous prime is 2120321471. The next prime is 2120321507. The reversal of 2120321505 is 5051230212.

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 2120321505 - 2⁸ = 2120321249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120321507) 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, 70677369 + ... + 70677398.

It is an arithmetic number, because the mean of its divisors is an integer number (424064304).

Almost surely, 2^2120321505 is an apocalyptic number.

It is an amenable number.

2120321505 is a deficient number, since it is larger than the sum of its proper divisors (1272192927).

2120321505 is a wasteful number, since it uses less digits than its factorization.

2120321505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141354775.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2120321505 is about 46046.9489217255. The cubic root of 2120321505 is about 1284.6965939742.

Adding to 2120321505 its reverse (5051230212), we get a palindrome (7171551717).

The spelling of 2120321505 in words is "two billion, one hundred twenty million, three hundred twenty-one thousand, five hundred five".