30212311221 has 12 divisors (see below), whose sum is σ = 44237814348. Its totient is φ = 19865628864.

The previous prime is 30212311183. The next prime is 30212311229. The reversal of 30212311221 is 12211321203.

It can be written as a sum of positive squares in 2 ways, for example, as 11631622500 + 18580688721 = 107850^2 + 136311^2 .

It is not a de Polignac number, because 30212311221 - 2¹⁰ = 30212310197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30212311194 and 30212311203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30212311229) 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, 22991970 + ... + 22993283.

It is an arithmetic number, because the mean of its divisors is an integer number (3686484529).

Almost surely, 2^30212311221 is an apocalyptic number.

It is an amenable number.

30212311221 is a deficient number, since it is larger than the sum of its proper divisors (14025503127).

30212311221 is a wasteful number, since it uses less digits than its factorization.

30212311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45985332 (or 45985329 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 30212311221 its reverse (12211321203), we get a palindrome (42423632424).

The spelling of 30212311221 in words is "thirty billion, two hundred twelve million, three hundred eleven thousand, two hundred twenty-one".