21122002000201 has 4 divisors (see below), whose sum is σ = 21122480990404. Its totient is φ = 21121523010000.

The previous prime is 21122002000171. The next prime is 21122002000247. The reversal of 21122002000201 is 10200020022112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16216769270025 + 4905232730176 = 4027005^2 + 2214776^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122002000201 - 2¹⁵ = 21122001967433 is a prime.

It is a super-2 number, since 2×21122002000201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122002000901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239428950 + ... + 239517151.

It is an arithmetic number, because the mean of its divisors is an integer number (5280620247601).

Almost surely, 2^{21122002000201} is an apocalyptic number.

It is an amenable number.

21122002000201 is a deficient number, since it is larger than the sum of its proper divisors (478990203).

21122002000201 is an equidigital number, since it uses as much as digits as its factorization.

21122002000201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478990202.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21122002000201 its reverse (10200020022112), we get a palindrome (31322022022313).

The spelling of 21122002000201 in words is "twenty-one trillion, one hundred twenty-two billion, two million, two hundred one", and thus it is an aban number.