21211112033201 has 8 divisors (see below), whose sum is σ = 21501898678344. Its totient is φ = 20920331427840.

The previous prime is 21211112033183. The next prime is 21211112033323. The reversal of 21211112033201 is 10233021111212.

It can be written as a sum of positive squares in 4 ways, for example, as 8938001143201 + 12273110890000 = 2989649^2 + 3503300^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21211112033201 is a prime.

It is a super-2 number, since 2×21211112033201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21211112033801) 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, 5803121 + ... + 8723441.

It is an arithmetic number, because the mean of its divisors is an integer number (2687737334793).

Almost surely, 2^{21211112033201} is an apocalyptic number.

It is an amenable number.

21211112033201 is a deficient number, since it is larger than the sum of its proper divisors (290786645143).

21211112033201 is an equidigital number, since it uses as much as digits as its factorization.

21211112033201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019891.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21211112033201 its reverse (10233021111212), we get a palindrome (31444133144413).

The spelling of 21211112033201 in words is "twenty-one trillion, two hundred eleven billion, one hundred twelve million, thirty-three thousand, two hundred one".