221140420253231 has 8 divisors (see below), whose sum is σ = 221458664036064. Its totient is φ = 220822215102720.

The previous prime is 221140420253197. The next prime is 221140420253237. The reversal of 221140420253231 is 132352024041122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221140420253231 - 2¹⁰ = 221140420252207 is a prime.

It is a super-2 number, since 2×221140420253231² (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 (221140420253237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1808411 + ... + 21108083.

It is an arithmetic number, because the mean of its divisors is an integer number (27682333004508).

Almost surely, 2^{221140420253231} is an apocalyptic number.

221140420253231 is a deficient number, since it is larger than the sum of its proper divisors (318243782833).

221140420253231 is a wasteful number, since it uses less digits than its factorization.

221140420253231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19316161.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 221140420253231 its reverse (132352024041122), we get a palindrome (353492444294353).

The spelling of 221140420253231 in words is "two hundred twenty-one trillion, one hundred forty billion, four hundred twenty million, two hundred fifty-three thousand, two hundred thirty-one".