171222122 has 4 divisors (see below), whose sum is σ = 256833186. Its totient is φ = 85611060.

The previous prime is 171222089. The next prime is 171222131. The reversal of 171222122 is 221222171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221222171 = 2591 ⋅85381.

It can be written as a sum of positive squares in only one way, i.e., 171112561 + 109561 = 13081^2 + 331^2 .

It is a junction number, because it is equal to n+sod(n) for n = 171222094 and 171222103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42805529 + ... + 42805532.

Almost surely, 2^171222122 is an apocalyptic number.

171222122 is a deficient number, since it is larger than the sum of its proper divisors (85611064).

171222122 is an equidigital number, since it uses as much as digits as its factorization.

171222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85611063.

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

The square root of 171222122 is about 13085.1871213216. The cubic root of 171222122 is about 555.2901353444.

Adding to 171222122 its reverse (221222171), we get a palindrome (392444293).

The spelling of 171222122 in words is "one hundred seventy-one million, two hundred twenty-two thousand, one hundred twenty-two".