21011001210201 has 16 divisors (see below), whose sum is σ = 28773919260800. Its totient is φ = 13627763854848.

The previous prime is 21011001210163. The next prime is 21011001210223. The reversal of 21011001210201 is 10201210011012.

It is a de Polignac number, because none of the positive numbers 2^k-21011001210201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21011001210401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5369821 + ... + 8417658.

It is an arithmetic number, because the mean of its divisors is an integer number (1798369953800).

Almost surely, 2^{21011001210201} is an apocalyptic number.

It is an amenable number.

21011001210201 is a deficient number, since it is larger than the sum of its proper divisors (7762918050599).

21011001210201 is a wasteful number, since it uses less digits than its factorization.

21011001210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13801248.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21011001210201 its reverse (10201210011012), we get a palindrome (31212211221213).

The spelling of 21011001210201 in words is "twenty-one trillion, eleven billion, one million, two hundred ten thousand, two hundred one".