21355342517001 has 8 divisors (see below), whose sum is σ = 28473964530624. Its totient is φ = 14236807757360.

The previous prime is 21355342516967. The next prime is 21355342517057. The reversal of 21355342517001 is 10071524355312.

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 21355342517001 - 2²¹ = 21355340419849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21355342517071) 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, 21240261 + ... + 22222946.

It is an arithmetic number, because the mean of its divisors is an integer number (3559245566328).

Almost surely, 2^{21355342517001} is an apocalyptic number.

It is an amenable number.

21355342517001 is a deficient number, since it is larger than the sum of its proper divisors (7118622013623).

21355342517001 is a wasteful number, since it uses less digits than its factorization.

21355342517001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43626991.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 21355342517001 in words is "twenty-one trillion, three hundred fifty-five billion, three hundred forty-two million, five hundred seventeen thousand, one".