21201010212201 has 16 divisors (see below), whose sum is σ = 28766387459520. Its totient is φ = 13885140802880.

The previous prime is 21201010212149. The next prime is 21201010212211. The reversal of 21201010212201 is 10221201010212.

It is a cyclic number.

It is not a de Polignac number, because 21201010212201 - 2³⁴ = 21183830343017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21201010212211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39849510 + ... + 40378031.

It is an arithmetic number, because the mean of its divisors is an integer number (1797899216220).

Almost surely, 2^{21201010212201} is an apocalyptic number.

It is an amenable number.

21201010212201 is a deficient number, since it is larger than the sum of its proper divisors (7565377247319).

21201010212201 is a wasteful number, since it uses less digits than its factorization.

21201010212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80229096.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21201010212201 its reverse (10221201010212), we get a palindrome (31422211222413).

The spelling of 21201010212201 in words is "twenty-one trillion, two hundred one billion, ten million, two hundred twelve thousand, two hundred one".