30821138011 has 2 divisors, whose sum is σ = 30821138012. Its totient is φ = 30821138010.

The previous prime is 30821138009. The next prime is 30821138041. The reversal of 30821138011 is 11083112803.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30821138011 - 2¹ = 30821138009 is a prime.

It is a super-2 number, since 2×30821138011² (a number of 22 digits) contains 22 as substring.

Together with 30821138009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30821138041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15410569005 + 15410569006.

It is an arithmetic number, because the mean of its divisors is an integer number (15410569006).

Almost surely, 2^30821138011 is an apocalyptic number.

30821138011 is a deficient number, since it is larger than the sum of its proper divisors (1).

30821138011 is an equidigital number, since it uses as much as digits as its factorization.

30821138011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 30821138011 in words is "thirty billion, eight hundred twenty-one million, one hundred thirty-eight thousand, eleven".