421101321 has 4 divisors (see below), whose sum is σ = 561468432. Its totient is φ = 280734212.

The previous prime is 421101311. The next prime is 421101337. The reversal of 421101321 is 123101124.

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 421101321 - 2²⁵ = 387546889 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 421101321.

It is not an unprimeable number, because it can be changed into a prime (421101301) 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, 70183551 + ... + 70183556.

It is an arithmetic number, because the mean of its divisors is an integer number (140367108).

Almost surely, 2^421101321 is an apocalyptic number.

It is an amenable number.

421101321 is a deficient number, since it is larger than the sum of its proper divisors (140367111).

421101321 is a wasteful number, since it uses less digits than its factorization.

421101321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140367110.

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

The square root of 421101321 is about 20520.7534218410. The cubic root of 421101321 is about 749.5412430021.

Adding to 421101321 its reverse (123101124), we get a palindrome (544202445).

The spelling of 421101321 in words is "four hundred twenty-one million, one hundred one thousand, three hundred twenty-one".