21106775083 has 2 divisors, whose sum is σ = 21106775084. Its totient is φ = 21106775082.

The previous prime is 21106775029. The next prime is 21106775089. The reversal of 21106775083 is 38057760112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21106775083 is a prime.

It is not a weakly prime, because it can be changed into another prime (21106775089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10553387541 + 10553387542.

It is an arithmetic number, because the mean of its divisors is an integer number (10553387542).

Almost surely, 2^21106775083 is an apocalyptic number.

21106775083 is a deficient number, since it is larger than the sum of its proper divisors (1).

21106775083 is an equidigital number, since it uses as much as digits as its factorization.

21106775083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 21106775083 in words is "twenty-one billion, one hundred six million, seven hundred seventy-five thousand, eighty-three".