321421101 has 4 divisors (see below), whose sum is σ = 428561472. Its totient is φ = 214280732.

The previous prime is 321421073. The next prime is 321421141. The reversal of 321421101 is 101124123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321421101 - 2²⁵ = 287866669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321421141) 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, 53570181 + ... + 53570186.

It is an arithmetic number, because the mean of its divisors is an integer number (107140368).

Almost surely, 2^321421101 is an apocalyptic number.

It is an amenable number.

321421101 is a deficient number, since it is larger than the sum of its proper divisors (107140371).

321421101 is a wasteful number, since it uses less digits than its factorization.

321421101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107140370.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 321421101 is about 17928.2207985065. The cubic root of 321421101 is about 685.0014037302.

Adding to 321421101 its reverse (101124123), we get a palindrome (422545224).

The spelling of 321421101 in words is "three hundred twenty-one million, four hundred twenty-one thousand, one hundred one".