21213702017 has 8 divisors (see below), whose sum is σ = 21237199680. Its totient is φ = 21190221360.

The previous prime is 21213702007. The next prime is 21213702089. The reversal of 21213702017 is 71020731212.

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 21213702017 - 2¹⁶ = 21213636481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213702007) 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, 5680883 + ... + 5684615.

It is an arithmetic number, because the mean of its divisors is an integer number (2654649960).

Almost surely, 2^21213702017 is an apocalyptic number.

It is an amenable number.

21213702017 is a deficient number, since it is larger than the sum of its proper divisors (23497663).

21213702017 is a wasteful number, since it uses less digits than its factorization.

21213702017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8503.

The product of its (nonzero) digits is 1176, while the sum is 26.

The spelling of 21213702017 in words is "twenty-one billion, two hundred thirteen million, seven hundred two thousand, seventeen".