21106000771 has 2 divisors, whose sum is σ = 21106000772. Its totient is φ = 21106000770.

The previous prime is 21106000709. The next prime is 21106000879. The reversal of 21106000771 is 17700060112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21106000771 - 2²¹ = 21103903619 is a prime.

It is not a weakly prime, because it can be changed into another prime (21106000171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10553000385 + 10553000386.

It is an arithmetic number, because the mean of its divisors is an integer number (10553000386).

Almost surely, 2^21106000771 is an apocalyptic number.

21106000771 is a deficient number, since it is larger than the sum of its proper divisors (1).

21106000771 is an equidigital number, since it uses as much as digits as its factorization.

21106000771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 25.

Adding to 21106000771 its reverse (17700060112), we get a palindrome (38806060883).

The spelling of 21106000771 in words is "twenty-one billion, one hundred six million, seven hundred seventy-one", and thus it is an aban number.