21320033201 has 8 divisors (see below), whose sum is σ = 21750114600. Its totient is φ = 20892551040.

The previous prime is 21320033197. The next prime is 21320033219. The reversal of 21320033201 is 10233002312.

It can be written as a sum of positive squares in 4 ways, for example, as 4654514176 + 16665519025 = 68224^2 + 129095^2 .

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 21320033201 - 2² = 21320033197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21320033201.

It is not an unprimeable number, because it can be changed into a prime (21320033221) 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, 633236 + ... + 666053.

It is an arithmetic number, because the mean of its divisors is an integer number (2718764325).

Almost surely, 2^21320033201 is an apocalyptic number.

It is an amenable number.

21320033201 is a deficient number, since it is larger than the sum of its proper divisors (430081399).

21320033201 is a wasteful number, since it uses less digits than its factorization.

21320033201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299619.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21320033201 its reverse (10233002312), we get a palindrome (31553035513).

The spelling of 21320033201 in words is "twenty-one billion, three hundred twenty million, thirty-three thousand, two hundred one".