221323132191 has 8 divisors (see below), whose sum is σ = 337254296704. Its totient is φ = 126470361240.

The previous prime is 221323132183. The next prime is 221323132213. The reversal of 221323132191 is 191231323122.

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

It is not a de Polignac number, because 221323132191 - 2³ = 221323132183 is a prime.

It is a super-3 number, since 3×221323132191³ (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 (221323130191) 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, 5269598365 + ... + 5269598406.

It is an arithmetic number, because the mean of its divisors is an integer number (42156787088).

Almost surely, 2^221323132191 is an apocalyptic number.

221323132191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221323132191 is a deficient number, since it is larger than the sum of its proper divisors (115931164513).

221323132191 is a wasteful number, since it uses less digits than its factorization.

221323132191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10539196781.

The product of its digits is 3888, while the sum is 30.

It can be divided in two parts, 2213231 and 32191, that added together give a palindrome (2245422).

The spelling of 221323132191 in words is "two hundred twenty-one billion, three hundred twenty-three million, one hundred thirty-two thousand, one hundred ninety-one".