30121130213 has 4 divisors (see below), whose sum is σ = 31892961420. Its totient is φ = 28349299008.

The previous prime is 30121130197. The next prime is 30121130261. The reversal of 30121130213 is 31203112103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31203112103 = 163993 ⋅190271.

It can be written as a sum of positive squares in 2 ways, for example, as 24542982244 + 5578147969 = 156662^2 + 74687^2 .

It is not a de Polignac number, because 30121130213 - 2⁴ = 30121130197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1771831189 = 30121130213 / (3 + 0 + 1 + 2 + 1 + 1 + 3 + 0 + 2 + 1 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30121130191 and 30121130200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121100213) 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, 885915578 + ... + 885915611.

It is an arithmetic number, because the mean of its divisors is an integer number (7973240355).

Almost surely, 2^30121130213 is an apocalyptic number.

It is an amenable number.

30121130213 is a deficient number, since it is larger than the sum of its proper divisors (1771831207).

30121130213 is a wasteful number, since it uses less digits than its factorization.

30121130213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771831206.

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

Adding to 30121130213 its reverse (31203112103), we get a palindrome (61324242316).

The spelling of 30121130213 in words is "thirty billion, one hundred twenty-one million, one hundred thirty thousand, two hundred thirteen".