21213320023001 has 8 divisors (see below), whose sum is σ = 21281692798824. Its totient is φ = 21144951060480.

The previous prime is 21213320022991. The next prime is 21213320023009. The reversal of 21213320023001 is 10032002331212.

It can be written as a sum of positive squares in 4 ways, for example, as 1630473610000 + 19582846413001 = 1276900^2 + 4425251^2 .

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 21213320023001 - 2²⁶ = 21213252914137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213320023009) 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, 10408385 + ... + 12278481.

It is an arithmetic number, because the mean of its divisors is an integer number (2660211599853).

Almost surely, 2^{21213320023001} is an apocalyptic number.

It is an amenable number.

21213320023001 is a deficient number, since it is larger than the sum of its proper divisors (68372775823).

21213320023001 is a wasteful number, since it uses less digits than its factorization.

21213320023001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906651.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21213320023001 its reverse (10032002331212), we get a palindrome (31245322354213).

The spelling of 21213320023001 in words is "twenty-one trillion, two hundred thirteen billion, three hundred twenty million, twenty-three thousand, one".