30000211021 has 4 divisors (see below), whose sum is σ = 32727502944. Its totient is φ = 27272919100.

The previous prime is 30000211019. The next prime is 30000211057. The reversal of 30000211021 is 12011200003.

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: 12011200003 = 11 ⋅1091927273.

It is a cyclic number.

It is not a de Polignac number, because 30000211021 - 2¹ = 30000211019 is a prime.

It is a super-2 number, since 2×30000211021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30000210989 and 30000211007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30000214021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1363645945 + ... + 1363645966.

It is an arithmetic number, because the mean of its divisors is an integer number (8181875736).

Almost surely, 2^30000211021 is an apocalyptic number.

It is an amenable number.

30000211021 is a deficient number, since it is larger than the sum of its proper divisors (2727291923).

30000211021 is a wasteful number, since it uses less digits than its factorization.

30000211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2727291922.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 30000211021 its reverse (12011200003), we get a palindrome (42011411024).

The spelling of 30000211021 in words is "thirty billion, two hundred eleven thousand, twenty-one".