30130001021 has 4 divisors (see below), whose sum is σ = 30139529952. Its totient is φ = 30120472092.

The previous prime is 30130000961. The next prime is 30130001029. The reversal of 30130001021 is 12010003103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30130001021 is a prime.

It is a super-2 number, since 2×30130001021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30130000993 and 30130001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30130001029) 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, 4759721 + ... + 4766046.

It is an arithmetic number, because the mean of its divisors is an integer number (7534882488).

Almost surely, 2^30130001021 is an apocalyptic number.

It is an amenable number.

30130001021 is a deficient number, since it is larger than the sum of its proper divisors (9528931).

30130001021 is an equidigital number, since it uses as much as digits as its factorization.

30130001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9528930.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 30130001021 its reverse (12010003103), we get a palindrome (42140004124).

The spelling of 30130001021 in words is "thirty billion, one hundred thirty million, one thousand, twenty-one".