30221421 has 4 divisors (see below), whose sum is σ = 40295232. Its totient is φ = 20147612.

The previous prime is 30221369. The next prime is 30221431. The reversal of 30221421 is 12412203.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30221421 - 2⁹ = 30220909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30221421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5036901 + ... + 5036906.

It is an arithmetic number, because the mean of its divisors is an integer number (10073808).

Almost surely, 2^30221421 is an apocalyptic number.

It is an amenable number.

30221421 is a deficient number, since it is larger than the sum of its proper divisors (10073811).

30221421 is a wasteful number, since it uses less digits than its factorization.

30221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10073810.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 30221421 is about 5497.4012951576. The cubic root of 30221421 is about 311.4858292384.

Adding to 30221421 its reverse (12412203), we get a palindrome (42633624).

The spelling of 30221421 in words is "thirty million, two hundred twenty-one thousand, four hundred twenty-one".