221222010671 has 4 divisors (see below), whose sum is σ = 221516581344. Its totient is φ = 220927440000.

The previous prime is 221222010643. The next prime is 221222010703. The reversal of 221222010671 is 176010222122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221222010671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221222010671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221222010631) 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, 147284210 + ... + 147285711.

It is an arithmetic number, because the mean of its divisors is an integer number (55379145336).

Almost surely, 2^221222010671 is an apocalyptic number.

221222010671 is a deficient number, since it is larger than the sum of its proper divisors (294570673).

221222010671 is an equidigital number, since it uses as much as digits as its factorization.

221222010671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294570672.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 221222010671 its reverse (176010222122), we get a palindrome (397232232793).

The spelling of 221222010671 in words is "two hundred twenty-one billion, two hundred twenty-two million, ten thousand, six hundred seventy-one".