321213101 has 16 divisors (see below), whose sum is σ = 367286400. Its totient is φ = 278065920.

The previous prime is 321213091. The next prime is 321213119. The reversal of 321213101 is 101312123.

It is not a de Polignac number, because 321213101 - 2¹⁰ = 321212077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321213121) 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, 56225 + ... + 61673.

It is an arithmetic number, because the mean of its divisors is an integer number (22955400).

Almost surely, 2^321213101 is an apocalyptic number.

It is an amenable number.

321213101 is a deficient number, since it is larger than the sum of its proper divisors (46073299).

321213101 is a wasteful number, since it uses less digits than its factorization.

321213101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5716.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 321213101 is about 17922.4189494610. The cubic root of 321213101 is about 684.8536110715.

Adding to 321213101 its reverse (101312123), we get a palindrome (422525224).

The spelling of 321213101 in words is "three hundred twenty-one million, two hundred thirteen thousand, one hundred one".