221131324213 has 8 divisors (see below), whose sum is σ = 228277091840. Its totient is φ = 213986337840.

The previous prime is 221131324189. The next prime is 221131324217. The reversal of 221131324213 is 312423131122.

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 221131324213 - 2²¹ = 221129227061 is a prime.

It is a super-3 number, since 3×221131324213³ (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 (221131324217) 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, 409723 + ... + 781111.

It is an arithmetic number, because the mean of its divisors is an integer number (28534636480).

Almost surely, 2^221131324213 is an apocalyptic number.

It is an amenable number.

221131324213 is a deficient number, since it is larger than the sum of its proper divisors (7145767627).

221131324213 is a wasteful number, since it uses less digits than its factorization.

221131324213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390627.

The product of its digits is 1728, while the sum is 25.

Adding to 221131324213 its reverse (312423131122), we get a palindrome (533554455335).

The spelling of 221131324213 in words is "two hundred twenty-one billion, one hundred thirty-one million, three hundred twenty-four thousand, two hundred thirteen".