1322220221 has 8 divisors (see below), whose sum is σ = 1516268544. Its totient is φ = 1129461840.

The previous prime is 1322220173. The next prime is 1322220227. The reversal of 1322220221 is 1220222231.

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

It is a cyclic number.

It is not a de Polignac number, because 1322220221 - 2⁶ = 1322220157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1322220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322220227) 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, 320285 + ... + 324386.

It is an arithmetic number, because the mean of its divisors is an integer number (189533568).

Almost surely, 2^1322220221 is an apocalyptic number.

It is an amenable number.

1322220221 is a deficient number, since it is larger than the sum of its proper divisors (194048323).

1322220221 is an equidigital number, since it uses as much as digits as its factorization.

1322220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644971.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1322220221 is about 36362.3461976809. The cubic root of 1322220221 is about 1097.5759903659.

Adding to 1322220221 its reverse (1220222231), we get a palindrome (2542442452).

The spelling of 1322220221 in words is "one billion, three hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".