1222205671 has 8 divisors (see below), whose sum is σ = 1276208640. Its totient is φ = 1168274712.

The previous prime is 1222205657. The next prime is 1222205683. The reversal of 1222205671 is 1765022221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222205671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222205071) 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, 18270 + ... + 52708.

It is an arithmetic number, because the mean of its divisors is an integer number (159526080).

Almost surely, 2^1222205671 is an apocalyptic number.

1222205671 is a deficient number, since it is larger than the sum of its proper divisors (54002969).

1222205671 is a wasteful number, since it uses less digits than its factorization.

1222205671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36005.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1222205671 is about 34960.0582236357. The cubic root of 1222205671 is about 1069.1732837392.

Adding to 1222205671 its reverse (1765022221), we get a palindrome (2987227892).

The spelling of 1222205671 in words is "one billion, two hundred twenty-two million, two hundred five thousand, six hundred seventy-one".