2175320121 has 16 divisors (see below), whose sum is σ = 3131713536. Its totient is φ = 1335154176.

The previous prime is 2175320117. The next prime is 2175320183. The reversal of 2175320121 is 1210235712.

It is not a de Polignac number, because 2175320121 - 2² = 2175320117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2175320091 and 2175320100.

It is not an unprimeable number, because it can be changed into a prime (2175320321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57880 + ... + 87753.

It is an arithmetic number, because the mean of its divisors is an integer number (195732096).

Almost surely, 2^2175320121 is an apocalyptic number.

It is an amenable number.

2175320121 is a deficient number, since it is larger than the sum of its proper divisors (956393415).

2175320121 is a wasteful number, since it uses less digits than its factorization.

2175320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146032.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 2175320121 is about 46640.3271965367. The cubic root of 2175320121 is about 1295.7097466469.

Adding to 2175320121 its reverse (1210235712), we get a palindrome (3385555833).

The spelling of 2175320121 in words is "two billion, one hundred seventy-five million, three hundred twenty thousand, one hundred twenty-one".