21354612717001 has 4 divisors (see below), whose sum is σ = 21383047621504. Its totient is φ = 21326177812500.

The previous prime is 21354612716989. The next prime is 21354612717037. The reversal of 21354612717001 is 10071721645312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21354612717001 - 2⁷ = 21354612716873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21354612717091) 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, 14217451125 + ... + 14217452626.

It is an arithmetic number, because the mean of its divisors is an integer number (5345761905376).

Almost surely, 2^{21354612717001} is an apocalyptic number.

It is an amenable number.

21354612717001 is a deficient number, since it is larger than the sum of its proper divisors (28434904503).

21354612717001 is an equidigital number, since it uses as much as digits as its factorization.

21354612717001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28434904502.

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

The spelling of 21354612717001 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred twelve million, seven hundred seventeen thousand, one".