321214221545 has 8 divisors (see below), whose sum is σ = 440522361024. Its totient is φ = 220261180464.

The previous prime is 321214221499. The next prime is 321214221557. The reversal of 321214221545 is 545122412123.

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 321214221545 - 2⁶ = 321214221481 is a prime.

It is a super-2 number, since 2×321214221545² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4588774559 + ... + 4588774628.

It is an arithmetic number, because the mean of its divisors is an integer number (55065295128).

Almost surely, 2^321214221545 is an apocalyptic number.

321214221545 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

321214221545 is a deficient number, since it is larger than the sum of its proper divisors (119308139479).

321214221545 is an equidigital number, since it uses as much as digits as its factorization.

321214221545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9177549199.

The product of its digits is 19200, while the sum is 32.

Adding to 321214221545 its reverse (545122412123), we get a palindrome (866336633668).

The spelling of 321214221545 in words is "three hundred twenty-one billion, two hundred fourteen million, two hundred twenty-one thousand, five hundred forty-five".