21700875211 has 4 divisors (see below), whose sum is σ = 21924595672. Its totient is φ = 21477154752.

The previous prime is 21700875197. The next prime is 21700875263. The reversal of 21700875211 is 11257800712.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21700875211 - 2⁷ = 21700875083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21700875011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111860085 + ... + 111860278.

It is an arithmetic number, because the mean of its divisors is an integer number (5481148918).

Almost surely, 2^21700875211 is an apocalyptic number.

21700875211 is a deficient number, since it is larger than the sum of its proper divisors (223720461).

21700875211 is an equidigital number, since it uses as much as digits as its factorization.

21700875211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223720460.

The product of its (nonzero) digits is 7840, while the sum is 34.

The spelling of 21700875211 in words is "twenty-one billion, seven hundred million, eight hundred seventy-five thousand, two hundred eleven".