21201011021201 has 8 divisors (see below), whose sum is σ = 23454127430208. Its totient is φ = 19002186574000.

The previous prime is 21201011021191. The next prime is 21201011021231. The reversal of 21201011021201 is 10212011010212.

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-21201011021201 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 (21201011021231) 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, 13572989630 + ... + 13572991191.

It is an arithmetic number, because the mean of its divisors is an integer number (2931765928776).

Almost surely, 2^{21201011021201} is an apocalyptic number.

It is an amenable number.

21201011021201 is a deficient number, since it is larger than the sum of its proper divisors (2253116409007).

21201011021201 is a wasteful number, since it uses less digits than its factorization.

21201011021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27145980903.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21201011021201 its reverse (10212011010212), we get a palindrome (31413022031413).

It can be divided in two parts, 212010 and 11021201, that added together give a palindrome (11233211).

The spelling of 21201011021201 in words is "twenty-one trillion, two hundred one billion, eleven million, twenty-one thousand, two hundred one".