30203030203021 has 4 divisors (see below), whose sum is σ = 32526340218652. Its totient is φ = 27879720187392.

The previous prime is 30203030203013. The next prime is 30203030203043. The reversal of 30203030203021 is 12030203030203.

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 12905840700900 + 17297189502121 = 3592470^2 + 4158989^2 .

It is a cyclic number.

It is not a de Polignac number, because 30203030203021 - 2³ = 30203030203013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30203030203021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30203030203061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1161655007796 + ... + 1161655007821.

It is an arithmetic number, because the mean of its divisors is an integer number (8131585054663).

Almost surely, 2^{30203030203021} is an apocalyptic number.

It is an amenable number.

30203030203021 is a deficient number, since it is larger than the sum of its proper divisors (2323310015631).

30203030203021 is a wasteful number, since it uses less digits than its factorization.

30203030203021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323310015630.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 30203030203021 its reverse (12030203030203), we get a palindrome (42233233233224).

The spelling of 30203030203021 in words is "thirty trillion, two hundred three billion, thirty million, two hundred three thousand, twenty-one".