30031220213 has 4 divisors (see below), whose sum is σ = 30034329420. Its totient is φ = 30028111008.

The previous prime is 30031220179. The next prime is 30031220231. The reversal of 30031220213 is 31202213003.

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 19768922404 + 10262297809 = 140602^2 + 101303^2 .

It is a cyclic number.

It is not a de Polignac number, because 30031220213 - 2¹⁶ = 30031154677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30031220191 and 30031220200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30031220293) 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, 1540070 + ... + 1559447.

It is an arithmetic number, because the mean of its divisors is an integer number (7508582355).

Almost surely, 2^30031220213 is an apocalyptic number.

It is an amenable number.

30031220213 is a deficient number, since it is larger than the sum of its proper divisors (3109207).

30031220213 is an equidigital number, since it uses as much as digits as its factorization.

30031220213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109206.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 30031220213 its reverse (31202213003), we get a palindrome (61233433216).

The spelling of 30031220213 in words is "thirty billion, thirty-one million, two hundred twenty thousand, two hundred thirteen".