321213201 has 8 divisors (see below), whose sum is σ = 428491104. Its totient is φ = 214038720.

The previous prime is 321213199. The next prime is 321213203. The reversal of 321213201 is 102312123.

It is an interprime number because it is at equal distance from previous prime (321213199) and next prime (321213203).

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

It is not a de Polignac number, because 321213201 - 2¹ = 321213199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321213203) 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, 18291 + ... + 31256.

It is an arithmetic number, because the mean of its divisors is an integer number (53561388).

Almost surely, 2^321213201 is an apocalyptic number.

It is an amenable number.

321213201 is a deficient number, since it is larger than the sum of its proper divisors (107277903).

321213201 is a wasteful number, since it uses less digits than its factorization.

321213201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51711.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 321213201 is about 17922.4217392628. The cubic root of 321213201 is about 684.8536821410.

Adding to 321213201 its reverse (102312123), we get a palindrome (423525324).

The spelling of 321213201 in words is "three hundred twenty-one million, two hundred thirteen thousand, two hundred one".