221130123321 has 32 divisors (see below), whose sum is σ = 316411982208. Its totient is φ = 136878243840.

The previous prime is 221130123307. The next prime is 221130123323. The reversal of 221130123321 is 123321031122.

It is not a de Polignac number, because 221130123321 - 2¹⁵ = 221130090553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221130123323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1477006 + ... + 1619816.

It is an arithmetic number, because the mean of its divisors is an integer number (9887874444).

Almost surely, 2^221130123321 is an apocalyptic number.

It is an amenable number.

221130123321 is a deficient number, since it is larger than the sum of its proper divisors (95281858887).

221130123321 is a wasteful number, since it uses less digits than its factorization.

221130123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143241.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221130123321 its reverse (123321031122), we get a palindrome (344451154443).

The spelling of 221130123321 in words is "two hundred twenty-one billion, one hundred thirty million, one hundred twenty-three thousand, three hundred twenty-one".