221033220434431 has 4 divisors (see below), whose sum is σ = 221494667659200. Its totient is φ = 220571773209664.

The previous prime is 221033220434357. The next prime is 221033220434437. The reversal of 221033220434431 is 134434022330122.

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 221033220434431 - 2⁴³ = 212237127412223 is a prime.

It is a super-2 number, since 2×221033220434431² (a number of 29 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 (221033220434437) 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, 230723611666 + ... + 230723612623.

It is an arithmetic number, because the mean of its divisors is an integer number (55373666914800).

Almost surely, 2^{221033220434431} is an apocalyptic number.

221033220434431 is a deficient number, since it is larger than the sum of its proper divisors (461447224769).

221033220434431 is an equidigital number, since it uses as much as digits as its factorization.

221033220434431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461447224768.

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 221033220434431 its reverse (134434022330122), we get a palindrome (355467242764553).

The spelling of 221033220434431 in words is "two hundred twenty-one trillion, thirty-three billion, two hundred twenty million, four hundred thirty-four thousand, four hundred thirty-one".