174220121 has 4 divisors (see below), whose sum is σ = 176606772. Its totient is φ = 171833472.

The previous prime is 174220103. The next prime is 174220127. The reversal of 174220121 is 121022471.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121022471 = 9283 ⋅13037.

It can be written as a sum of positive squares in 2 ways, for example, as 92064025 + 82156096 = 9595^2 + 9064^2 .

It is a cyclic number.

It is not a de Polignac number, because 174220121 - 2¹⁴ = 174203737 is a prime.

It is a super-2 number, since 2×174220121² = 60705301122509282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 174220093 and 174220102.

It is not an unprimeable number, because it can be changed into a prime (174220127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193216 + ... + 1193361.

It is an arithmetic number, because the mean of its divisors is an integer number (44151693).

Almost surely, 2^174220121 is an apocalyptic number.

It is an amenable number.

174220121 is a deficient number, since it is larger than the sum of its proper divisors (2386651).

174220121 is an equidigital number, since it uses as much as digits as its factorization.

174220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386650.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 174220121 is about 13199.2469860974. The cubic root of 174220121 is about 558.5123365358.

Adding to 174220121 its reverse (121022471), we get a palindrome (295242592).

The spelling of 174220121 in words is "one hundred seventy-four million, two hundred twenty thousand, one hundred twenty-one".