30211121405 has 4 divisors (see below), whose sum is σ = 36253345692. Its totient is φ = 24168897120.

The previous prime is 30211121387. The next prime is 30211121429. The reversal of 30211121405 is 50412111203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50412111203 = 3581 ⋅14077663.

It can be written as a sum of positive squares in 2 ways, for example, as 10239213721 + 19971907684 = 101189^2 + 141322^2 .

It is not a de Polignac number, because 30211121405 - 2¹⁶ = 30211055869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 3021112136 + ... + 3021112145.

It is an arithmetic number, because the mean of its divisors is an integer number (9063336423).

Almost surely, 2^30211121405 is an apocalyptic number.

It is an amenable number.

30211121405 is a deficient number, since it is larger than the sum of its proper divisors (6042224287).

30211121405 is an equidigital number, since it uses as much as digits as its factorization.

30211121405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6042224286.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 30211121405 its reverse (50412111203), we get a palindrome (80623232608).

The spelling of 30211121405 in words is "thirty billion, two hundred eleven million, one hundred twenty-one thousand, four hundred five".