30113020021 has 12 divisors (see below), whose sum is σ = 35036034732. Its totient is φ = 25806294528.

The previous prime is 30113020001. The next prime is 30113020027. The reversal of 30113020021 is 12002031103.

It can be written as a sum of positive squares in 2 ways, for example, as 17553335121 + 12559684900 = 132489^2 + 112070^2 .

It is not a de Polignac number, because 30113020021 - 2¹⁵ = 30112987253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30113019983 and 30113020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30113020027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217941 + ... + 328213.

It is an arithmetic number, because the mean of its divisors is an integer number (2919669561).

Almost surely, 2^30113020021 is an apocalyptic number.

It is an amenable number.

30113020021 is a deficient number, since it is larger than the sum of its proper divisors (4923014711).

30113020021 is a wasteful number, since it uses less digits than its factorization.

30113020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115860 (or 115853 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 30113020021 its reverse (12002031103), we get a palindrome (42115051124).

The spelling of 30113020021 in words is "thirty billion, one hundred thirteen million, twenty thousand, twenty-one".