221030031321 has 48 divisors (see below), whose sum is σ = 351073569600. Its totient is φ = 132889200000.

The previous prime is 221030031319. The next prime is 221030031389. The reversal of 221030031321 is 123130030122.

221030031321 is a `hidden beast` number, since 2 + 2 + 10 + 300 + 31 + 321 = 666.

It is not a de Polignac number, because 221030031321 - 2¹ = 221030031319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221030031294 and 221030031303.

It is not an unprimeable number, because it can be changed into a prime (221030031301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12101446 + ... + 12119696.

It is an arithmetic number, because the mean of its divisors is an integer number (7314032700).

Almost surely, 2^221030031321 is an apocalyptic number.

It is an amenable number.

221030031321 is a deficient number, since it is larger than the sum of its proper divisors (130043538279).

221030031321 is a wasteful number, since it uses less digits than its factorization.

221030031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19238 (or 19235 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 221030031321 its reverse (123130030122), we get a palindrome (344160061443).

The spelling of 221030031321 in words is "two hundred twenty-one billion, thirty million, thirty-one thousand, three hundred twenty-one".