30012032021 has 4 divisors (see below), whose sum is σ = 30744032844. Its totient is φ = 29280031200.

The previous prime is 30012032003. The next prime is 30012032041. The reversal of 30012032021 is 12023021003.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1407075121 + 28604956900 = 37511^2 + 169130^2 .

It is a cyclic number.

It is not a de Polignac number, because 30012032021 - 2²⁶ = 29944923157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30012031987 and 30012032005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30012032041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366000350 + ... + 366000431.

It is an arithmetic number, because the mean of its divisors is an integer number (7686008211).

Almost surely, 2^30012032021 is an apocalyptic number.

It is an amenable number.

30012032021 is a deficient number, since it is larger than the sum of its proper divisors (732000823).

30012032021 is an equidigital number, since it uses as much as digits as its factorization.

30012032021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732000822.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 30012032021 its reverse (12023021003), we get a palindrome (42035053024).

The spelling of 30012032021 in words is "thirty billion, twelve million, thirty-two thousand, twenty-one".