321100121 has 4 divisors (see below), whose sum is σ = 322070544. Its totient is φ = 320129700.

The previous prime is 321100067. The next prime is 321100159. The reversal of 321100121 is 121001123.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121001123 = 2539 ⋅47657.

It is a cyclic number.

It is not a de Polignac number, because 321100121 - 2¹⁸ = 320837977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321100321) 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, 484715 + ... + 485376.

It is an arithmetic number, because the mean of its divisors is an integer number (80517636).

Almost surely, 2^321100121 is an apocalyptic number.

It is an amenable number.

321100121 is a deficient number, since it is larger than the sum of its proper divisors (970423).

321100121 is an equidigital number, since it uses as much as digits as its factorization.

321100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970422.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 321100121 is about 17919.2667539718. The cubic root of 321100121 is about 684.7733073373.

Adding to 321100121 its reverse (121001123), we get a palindrome (442101244).

The spelling of 321100121 in words is "three hundred twenty-one million, one hundred thousand, one hundred twenty-one".