21221110102201 has 16 divisors (see below), whose sum is σ = 21451768790400. Its totient is φ = 20990931833088.

The previous prime is 21221110102183. The next prime is 21221110102261. The reversal of 21221110102201 is 10220101112212.

It is a cyclic number.

It is not a de Polignac number, because 21221110102201 - 2³⁹ = 20671354288313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221110102261) 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, 896566395 + ... + 896590063.

It is an arithmetic number, because the mean of its divisors is an integer number (1340735549400).

Almost surely, 2^{21221110102201} is an apocalyptic number.

It is an amenable number.

21221110102201 is a deficient number, since it is larger than the sum of its proper divisors (230658688199).

21221110102201 is a wasteful number, since it uses less digits than its factorization.

21221110102201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33408.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21221110102201 its reverse (10220101112212), we get a palindrome (31441211214413).

The spelling of 21221110102201 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, one hundred two thousand, two hundred one".