21120000311 has 2 divisors, whose sum is σ = 21120000312. Its totient is φ = 21120000310.

The previous prime is 21120000299. The next prime is 21120000331. The reversal of 21120000311 is 11300002112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21120000311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21120000292 and 21120000301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120000331) 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 as a sum of consecutive naturals, namely, 10560000155 + 10560000156.

It is an arithmetic number, because the mean of its divisors is an integer number (10560000156).

Almost surely, 2^21120000311 is an apocalyptic number.

21120000311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120000311 is an equidigital number, since it uses as much as digits as its factorization.

21120000311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21120000311 its reverse (11300002112), we get a palindrome (32420002423).

The spelling of 21120000311 in words is "twenty-one billion, one hundred twenty million, three hundred eleven", and thus it is an aban number.