321220229 has 16 divisors (see below), whose sum is σ = 355155840. Its totient is φ = 288096960.

The previous prime is 321220223. The next prime is 321220247. The reversal of 321220229 is 922022123.

It is a cyclic number.

It is not a de Polignac number, because 321220229 - 2²⁰ = 320171653 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 (321220223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 576419 + ... + 576975.

It is an arithmetic number, because the mean of its divisors is an integer number (22197240).

Almost surely, 2^321220229 is an apocalyptic number.

It is an amenable number.

321220229 is a deficient number, since it is larger than the sum of its proper divisors (33935611).

321220229 is a wasteful number, since it uses less digits than its factorization.

321220229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 321220229 is about 17922.6178054435. The cubic root of 321220229 is about 684.8586768678.

The spelling of 321220229 in words is "three hundred twenty-one million, two hundred twenty thousand, two hundred twenty-nine".