2120154017 has 4 divisors (see below), whose sum is σ = 2122393776. Its totient is φ = 2117914260.

The previous prime is 2120153989. The next prime is 2120154019. The reversal of 2120154017 is 7104510212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2120154017 - 2¹² = 2120149921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2120153983 and 2120154001.

It is not an unprimeable number, because it can be changed into a prime (2120154019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118459 + ... + 1120352.

It is an arithmetic number, because the mean of its divisors is an integer number (530598444).

Almost surely, 2^2120154017 is an apocalyptic number.

It is an amenable number.

2120154017 is a deficient number, since it is larger than the sum of its proper divisors (2239759).

2120154017 is an equidigital number, since it uses as much as digits as its factorization.

2120154017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239758.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 2120154017 is about 46045.1302202524. The cubic root of 2120154017 is about 1284.6627662538.

Adding to 2120154017 its reverse (7104510212), we get a palindrome (9224664229).

The spelling of 2120154017 in words is "two billion, one hundred twenty million, one hundred fifty-four thousand, seventeen".