21170700111 has 8 divisors (see below), whose sum is σ = 30793745664. Its totient is φ = 12830727320.

The previous prime is 21170700107. The next prime is 21170700149. The reversal of 21170700111 is 11100707112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21170700111 - 2² = 21170700107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21170700211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320768151 + ... + 320768216.

It is an arithmetic number, because the mean of its divisors is an integer number (3849218208).

Almost surely, 2^21170700111 is an apocalyptic number.

21170700111 is a deficient number, since it is larger than the sum of its proper divisors (9623045553).

21170700111 is a wasteful number, since it uses less digits than its factorization.

21170700111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641536381.

The product of its (nonzero) digits is 98, while the sum is 21.

The spelling of 21170700111 in words is "twenty-one billion, one hundred seventy million, seven hundred thousand, one hundred eleven".