30113123021 has 4 divisors (see below), whose sum is σ = 30181098912. Its totient is φ = 30045147132.

The previous prime is 30113123017. The next prime is 30113123023. The reversal of 30113123021 is 12032131103.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12032131103 = 79 ⋅152305457.

It is a cyclic number.

It is not a de Polignac number, because 30113123021 - 2² = 30113123017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30113123023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33987281 + ... + 33988166.

It is an arithmetic number, because the mean of its divisors is an integer number (7545274728).

Almost surely, 2^30113123021 is an apocalyptic number.

It is an amenable number.

30113123021 is a deficient number, since it is larger than the sum of its proper divisors (67975891).

30113123021 is an equidigital number, since it uses as much as digits as its factorization.

30113123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67975890.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 30113123021 its reverse (12032131103), we get a palindrome (42145254124).

The spelling of 30113123021 in words is "thirty billion, one hundred thirteen million, one hundred twenty-three thousand, twenty-one".