320142043421 has 4 divisors (see below), whose sum is σ = 330469206144. Its totient is φ = 309814880700.

The previous prime is 320142043363. The next prime is 320142043451. The reversal of 320142043421 is 124340241023.

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 320142043421 - 2¹⁰ = 320142042397 is a prime.

It is a super-3 number, since 3×320142043421³ (a number of 35 digits) contains 333 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 (320142043451) 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, 5163581315 + ... + 5163581376.

It is an arithmetic number, because the mean of its divisors is an integer number (82617301536).

Almost surely, 2^320142043421 is an apocalyptic number.

320142043421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

320142043421 is a deficient number, since it is larger than the sum of its proper divisors (10327162723).

320142043421 is a wasteful number, since it uses less digits than its factorization.

320142043421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10327162722.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 320142043421 its reverse (124340241023), we get a palindrome (444482284444).

The spelling of 320142043421 in words is "three hundred twenty billion, one hundred forty-two million, forty-three thousand, four hundred twenty-one".