30211030021 has 4 divisors (see below), whose sum is σ = 31988149452. Its totient is φ = 28433910592.

The previous prime is 30211029923. The next prime is 30211030037. The reversal of 30211030021 is 12003011203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12003011203 = 73 ⋅164424811.

It can be written as a sum of positive squares in 2 ways, for example, as 27984605796 + 2226424225 = 167286^2 + 47185^2 .

It is not a de Polignac number, because 30211030021 - 2²¹ = 30208932869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30211029983 and 30211030010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30211036021) 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, 888559690 + ... + 888559723.

It is an arithmetic number, because the mean of its divisors is an integer number (7997037363).

Almost surely, 2^30211030021 is an apocalyptic number.

It is an amenable number.

30211030021 is a deficient number, since it is larger than the sum of its proper divisors (1777119431).

30211030021 is a wasteful number, since it uses less digits than its factorization.

30211030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777119430.

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

Adding to 30211030021 its reverse (12003011203), we get a palindrome (42214041224).

The spelling of 30211030021 in words is "thirty billion, two hundred eleven million, thirty thousand, twenty-one".