30012021 has 48 divisors (see below), whose sum is σ = 50319360. Its totient is φ = 17072640.

The previous prime is 30012019. The next prime is 30012029. The reversal of 30012021 is 12021003.

It is a happy number.

It is not a de Polignac number, because 30012021 - 2¹ = 30012019 is a prime.

It is a super-3 number, since 3×30012021³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 30011994 and 30012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30012029) 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, 157036 + ... + 157226.

It is an arithmetic number, because the mean of its divisors is an integer number (1048320).

Almost surely, 2^30012021 is an apocalyptic number.

It is an amenable number.

30012021 is a deficient number, since it is larger than the sum of its proper divisors (20307339).

30012021 is a wasteful number, since it uses less digits than its factorization.

30012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 30012021 is about 5478.3228272894. The cubic root of 30012021 is about 310.7647473221.

Adding to 30012021 its reverse (12021003), we get a palindrome (42033024).

It can be divided in two parts, 300 and 12021, that added together give a palindrome (12321).

The spelling of 30012021 in words is "thirty million, twelve thousand, twenty-one".