21399334001 has 8 divisors (see below), whose sum is σ = 23439433320. Its totient is φ = 19446047488.

The previous prime is 21399333973. The next prime is 21399334031. The reversal of 21399334001 is 10043399312.

It can be written as a sum of positive squares in 4 ways, for example, as 10495797601 + 10903536400 = 102449^2 + 104420^2 .

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 21399334001 - 2³⁴ = 4219464817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21399334031) 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, 21702686 + ... + 21703671.

It is an arithmetic number, because the mean of its divisors is an integer number (2929929165).

Almost surely, 2^21399334001 is an apocalyptic number.

It is an amenable number.

21399334001 is a deficient number, since it is larger than the sum of its proper divisors (2040099319).

21399334001 is a wasteful number, since it uses less digits than its factorization.

21399334001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43406403.

The product of its (nonzero) digits is 17496, while the sum is 35.

The spelling of 21399334001 in words is "twenty-one billion, three hundred ninety-nine million, three hundred thirty-four thousand, one".