21110848867 has 2 divisors, whose sum is σ = 21110848868. Its totient is φ = 21110848866.

The previous prime is 21110848841. The next prime is 21110848879. The reversal of 21110848867 is 76884801112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110848867 - 2⁷ = 21110848739 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110848817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555424433 + 10555424434.

It is an arithmetic number, because the mean of its divisors is an integer number (10555424434).

Almost surely, 2^21110848867 is an apocalyptic number.

21110848867 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110848867 is an equidigital number, since it uses as much as digits as its factorization.

21110848867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172032, while the sum is 46.

The spelling of 21110848867 in words is "twenty-one billion, one hundred ten million, eight hundred forty-eight thousand, eight hundred sixty-seven".