30122421 has 16 divisors (see below), whose sum is σ = 47382528. Its totient is φ = 16657200.

The previous prime is 30122401. The next prime is 30122423. The reversal of 30122421 is 12422103.

It is not a de Polignac number, because 30122421 - 2⁷ = 30122293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30122421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30122423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22485 + ... + 23786.

It is an arithmetic number, because the mean of its divisors is an integer number (2961408).

Almost surely, 2^30122421 is an apocalyptic number.

30122421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

30122421 is a deficient number, since it is larger than the sum of its proper divisors (17260107).

30122421 is a wasteful number, since it uses less digits than its factorization.

30122421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46312.

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

The square root of 30122421 is about 5488.3896545344. The cubic root of 30122421 is about 311.1453331072.

Adding to 30122421 its reverse (12422103), we get a palindrome (42544524).

It can be divided in two parts, 301 and 22421, that added together give a palindrome (22722).

The spelling of 30122421 in words is "thirty million, one hundred twenty-two thousand, four hundred twenty-one".