30210032021 has 4 divisors (see below), whose sum is σ = 32533880652. Its totient is φ = 27886183392.

The previous prime is 30210032011. The next prime is 30210032029. The reversal of 30210032021 is 12023001203.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12023001203 = 19 ⋅632789537.

It can be written as a sum of positive squares in 2 ways, for example, as 2782035025 + 27427996996 = 52745^2 + 165614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30210032021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30210031987 and 30210032005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30210032029) 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, 1161924296 + ... + 1161924321.

It is an arithmetic number, because the mean of its divisors is an integer number (8133470163).

Almost surely, 2^30210032021 is an apocalyptic number.

It is an amenable number.

30210032021 is a deficient number, since it is larger than the sum of its proper divisors (2323848631).

30210032021 is a wasteful number, since it uses less digits than its factorization.

30210032021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323848630.

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

Adding to 30210032021 its reverse (12023001203), we get a palindrome (42233033224).

The spelling of 30210032021 in words is "thirty billion, two hundred ten million, thirty-two thousand, twenty-one".