321421024440143 has 4 divisors (see below), whose sum is σ = 321421135662240. Its totient is φ = 321420913218048.

The previous prime is 321421024440073. The next prime is 321421024440151. The reversal of 321421024440143 is 341044420124123.

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

It is a cyclic number.

It is not a de Polignac number, because 321421024440143 - 2⁴⁶ = 251052280262479 is a prime.

It is a super-2 number, since 2×321421024440143² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321421024440343) 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, 51157298 + ... + 57095631.

It is an arithmetic number, because the mean of its divisors is an integer number (80355283915560).

Almost surely, 2^{321421024440143} is an apocalyptic number.

321421024440143 is a deficient number, since it is larger than the sum of its proper divisors (111222097).

321421024440143 is a wasteful number, since it uses less digits than its factorization.

321421024440143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111222096.

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 321421024440143 its reverse (341044420124123), we get a palindrome (662465444564266).

The spelling of 321421024440143 in words is "three hundred twenty-one trillion, four hundred twenty-one billion, twenty-four million, four hundred forty thousand, one hundred forty-three".