21011033201 has 8 divisors (see below), whose sum is σ = 21202127304. Its totient is φ = 20820787200.

The previous prime is 21011033191. The next prime is 21011033287. The reversal of 21011033201 is 10233011012.

It can be written as a sum of positive squares in 4 ways, for example, as 8556250000 + 12454783201 = 92500^2 + 111601^2 .

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 21011033201 - 2¹⁰ = 21011032177 is a prime.

It is a super-4 number, since 4×21011033201⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011033291) 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, 162200 + ... + 261401.

It is an arithmetic number, because the mean of its divisors is an integer number (2650265913).

Almost surely, 2^21011033201 is an apocalyptic number.

It is an amenable number.

21011033201 is a deficient number, since it is larger than the sum of its proper divisors (191094103).

21011033201 is a wasteful number, since it uses less digits than its factorization.

21011033201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424051.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21011033201 its reverse (10233011012), we get a palindrome (31244044213).

The spelling of 21011033201 in words is "twenty-one billion, eleven million, thirty-three thousand, two hundred one".