30403021221 has 20 divisors (see below), whose sum is σ = 48088440972. Its totient is φ = 19076404608.

The previous prime is 30403021219. The next prime is 30403021241. The reversal of 30403021221 is 12212030403.

30403021221 is a `hidden beast` number, since 30 + 403 + 0 + 212 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21719390625 + 8683630596 = 147375^2 + 93186^2 .

It is not a de Polignac number, because 30403021221 - 2¹ = 30403021219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30403021194 and 30403021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30403021241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11038210 + ... + 11040963.

Almost surely, 2^30403021221 is an apocalyptic number.

It is an amenable number.

30403021221 is a deficient number, since it is larger than the sum of its proper divisors (17685419751).

30403021221 is a wasteful number, since it uses less digits than its factorization.

30403021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22079202 (or 22079193 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 30403021221 its reverse (12212030403), we get a palindrome (42615051624).

The spelling of 30403021221 in words is "thirty billion, four hundred three million, twenty-one thousand, two hundred twenty-one".