321200101 has 4 divisors (see below), whose sum is σ = 321353100. Its totient is φ = 321047104.

The previous prime is 321200093. The next prime is 321200107. The reversal of 321200101 is 101002123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52272900 + 268927201 = 7230^2 + 16399^2 .

It is a cyclic number.

It is not a de Polignac number, because 321200101 - 2³ = 321200093 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 (321200107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73306 + ... + 77563.

It is an arithmetic number, because the mean of its divisors is an integer number (80338275).

Almost surely, 2^321200101 is an apocalyptic number.

It is an amenable number.

321200101 is a deficient number, since it is larger than the sum of its proper divisors (152999).

321200101 is a wasteful number, since it uses less digits than its factorization.

321200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152998.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 321200101 is about 17922.0562715331. The cubic root of 321200101 is about 684.8443719122.

Adding to 321200101 its reverse (101002123), we get a palindrome (422202224).

The spelling of 321200101 in words is "three hundred twenty-one million, two hundred thousand, one hundred one".