221331313133 has 12 divisors (see below), whose sum is σ = 264426072288. Its totient is φ = 181464179160.

The previous prime is 221331313127. The next prime is 221331313213. The reversal of 221331313133 is 331313133122.

It is not a de Polignac number, because 221331313133 - 2²⁴ = 221314535917 is a prime.

It is a super-4 number, since 4×221331313133⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331313933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29881703 + ... + 29889108.

It is an arithmetic number, because the mean of its divisors is an integer number (22035506024).

Almost surely, 2^221331313133 is an apocalyptic number.

221331313133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

221331313133 is a deficient number, since it is larger than the sum of its proper divisors (43094759155).

221331313133 is an equidigital number, since it uses as much as digits as its factorization.

221331313133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59770864 (or 59770841 counting only the distinct ones).

The product of its digits is 2916, while the sum is 26.

Adding to 221331313133 its reverse (331313133122), we get a palindrome (552644446255).

The spelling of 221331313133 in words is "two hundred twenty-one billion, three hundred thirty-one million, three hundred thirteen thousand, one hundred thirty-three".