21211100122201 has 4 divisors (see below), whose sum is σ = 23139381951504. Its totient is φ = 19282818292900.

The previous prime is 21211100122183. The next prime is 21211100122259. The reversal of 21211100122201 is 10222100111212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21211100122201 - 2¹⁹ = 21211099597913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211100122271) 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 3 ways as a sum of consecutive naturals, for example, 964140914635 + ... + 964140914656.

It is an arithmetic number, because the mean of its divisors is an integer number (5784845487876).

Almost surely, 2^{21211100122201} is an apocalyptic number.

It is an amenable number.

21211100122201 is a deficient number, since it is larger than the sum of its proper divisors (1928281829303).

21211100122201 is a wasteful number, since it uses less digits than its factorization.

21211100122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928281829302.

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

Adding to 21211100122201 its reverse (10222100111212), we get a palindrome (31433200233413).

The spelling of 21211100122201 in words is "twenty-one trillion, two hundred eleven billion, one hundred million, one hundred twenty-two thousand, two hundred one".