221130133121 has 16 divisors (see below), whose sum is σ = 239325945600. Its totient is φ = 203627779200.

The previous prime is 221130133057. The next prime is 221130133153. The reversal of 221130133121 is 121331031122.

It is a happy number.

It is not a de Polignac number, because 221130133121 - 2⁶ = 221130133057 is a prime.

It is a super-2 number, since 2×221130133121² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221130133093 and 221130133102.

It is not an unprimeable number, because it can be changed into a prime (221130133171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312626 + ... + 734843.

It is an arithmetic number, because the mean of its divisors is an integer number (14957871600).

Almost surely, 2^221130133121 is an apocalyptic number.

It is an amenable number.

221130133121 is a deficient number, since it is larger than the sum of its proper divisors (18195812479).

221130133121 is a wasteful number, since it uses less digits than its factorization.

221130133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047800.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 221130133121 its reverse (121331031122), we get a palindrome (342461164243).

It can be divided in two parts, 2211301 and 33121, that added together give a palindrome (2244422).

The spelling of 221130133121 in words is "two hundred twenty-one billion, one hundred thirty million, one hundred thirty-three thousand, one hundred twenty-one".