321214221355 has 8 divisors (see below), whose sum is σ = 386006937264. Its totient is φ = 256604796000.

The previous prime is 321214221347. The next prime is 321214221389. The reversal of 321214221355 is 553122412123.

It is a happy number.

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

It is not a de Polignac number, because 321214221355 - 2³ = 321214221347 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45818781 + ... + 45825790.

It is an arithmetic number, because the mean of its divisors is an integer number (48250867158).

Almost surely, 2^321214221355 is an apocalyptic number.

321214221355 is a deficient number, since it is larger than the sum of its proper divisors (64792715909).

321214221355 is an equidigital number, since it uses as much as digits as its factorization.

321214221355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91645277.

The product of its digits is 14400, while the sum is 31.

Adding to 321214221355 its reverse (553122412123), we get a palindrome (874336633478).

The spelling of 321214221355 in words is "three hundred twenty-one billion, two hundred fourteen million, two hundred twenty-one thousand, three hundred fifty-five".