30233030021 has 4 divisors (see below), whose sum is σ = 30235180332. Its totient is φ = 30230879712.

The previous prime is 30233030017. The next prime is 30233030029. The reversal of 30233030021 is 12003033203.

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 10935930625 + 19297099396 = 104575^2 + 138914^2 .

It is a cyclic number.

It is not a de Polignac number, because 30233030021 - 2² = 30233030017 is a prime.

It is a super-2 number, since 2×30233030021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30233030029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053926 + ... + 1082231.

It is an arithmetic number, because the mean of its divisors is an integer number (7558795083).

Almost surely, 2^30233030021 is an apocalyptic number.

It is an amenable number.

30233030021 is a deficient number, since it is larger than the sum of its proper divisors (2150311).

30233030021 is a wasteful number, since it uses less digits than its factorization.

30233030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150310.

The product of its (nonzero) digits is 324, while the sum is 17.

Adding to 30233030021 its reverse (12003033203), we get a palindrome (42236063224).

The spelling of 30233030021 in words is "thirty billion, two hundred thirty-three million, thirty thousand, twenty-one".