11122121220201 has 20 divisors (see below), whose sum is σ = 16619016408324. Its totient is φ = 7412743836000.

The previous prime is 11122121220169. The next prime is 11122121220241. The reversal of 11122121220201 is 10202212122111.

11122121220201 is a `hidden beast` number, since 1 + 1 + 1 + 221 + 21 + 220 + 201 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6666543261225 + 4455577958976 = 2581965^2 + 2110824^2 .

It is not a de Polignac number, because 11122121220201 - 2⁵ = 11122121220169 is a prime.

It is a super-2 number, since 2×11122121220201² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11122121220241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18250630 + ... + 18850191.

Almost surely, 2^{11122121220201} is an apocalyptic number.

It is an amenable number.

11122121220201 is a deficient number, since it is larger than the sum of its proper divisors (5496895188123).

11122121220201 is an equidigital number, since it uses as much as digits as its factorization.

11122121220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37104534 (or 37104525 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11122121220201 its reverse (10202212122111), we get a palindrome (21324333342312).

The spelling of 11122121220201 in words is "eleven trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred twenty thousand, two hundred one".