21012201010001 has 8 divisors (see below), whose sum is σ = 21632858016000. Its totient is φ = 20396694684960.

The previous prime is 21012201009991. The next prime is 21012201010027. The reversal of 21012201010001 is 10001010221012.

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 21012201010001 - 2¹⁰ = 21012201008977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012201010201) 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, 1287661961 + ... + 1287678278.

It is an arithmetic number, because the mean of its divisors is an integer number (2704107252000).

Almost surely, 2^{21012201010001} is an apocalyptic number.

It is an amenable number.

21012201010001 is a deficient number, since it is larger than the sum of its proper divisors (620657005999).

21012201010001 is a wasteful number, since it uses less digits than its factorization.

21012201010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575340479.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21012201010001 its reverse (10001010221012), we get a palindrome (31013211231013).

The spelling of 21012201010001 in words is "twenty-one trillion, twelve billion, two hundred one million, ten thousand, one".