21122211110201 has 4 divisors (see below), whose sum is σ = 21480214688400. Its totient is φ = 20764207532004.

The previous prime is 21122211110179. The next prime is 21122211110207. The reversal of 21122211110201 is 10201111222112.

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 21122211110201 - 2³⁰ = 21121137368377 is a prime.

It is a super-2 number, since 2×21122211110201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21122211110201.

It is not an unprimeable number, because it can be changed into a prime (21122211110207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179001789011 + ... + 179001789128.

It is an arithmetic number, because the mean of its divisors is an integer number (5370053672100).

Almost surely, 2^{21122211110201} is an apocalyptic number.

It is an amenable number.

21122211110201 is a deficient number, since it is larger than the sum of its proper divisors (358003578199).

21122211110201 is an equidigital number, since it uses as much as digits as its factorization.

21122211110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358003578198.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21122211110201 its reverse (10201111222112), we get a palindrome (31323322332313).

The spelling of 21122211110201 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred eleven million, one hundred ten thousand, two hundred one".