2220201121221 has 12 divisors (see below), whose sum is σ = 3217203048748. Its totient is φ = 1475405216064.

The previous prime is 2220201121207. The next prime is 2220201121231. The reversal of 2220201121221 is 1221211020222.

It is a happy number.

2220201121221 is a `hidden beast` number, since 2 + 220 + 201 + 1 + 21 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 726098268996 + 1494102852225 = 852114^2 + 1222335^2 .

It is not a de Polignac number, because 2220201121221 - 2¹¹ = 2220201119173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2220201121194 and 2220201121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220201121231) 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 11 ways as a sum of consecutive naturals, for example, 394069090 + ... + 394074723.

Almost surely, 2^{2220201121221} is an apocalyptic number.

It is an amenable number.

2220201121221 is a deficient number, since it is larger than the sum of its proper divisors (997001927527).

2220201121221 is a wasteful number, since it uses less digits than its factorization.

2220201121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788144132 (or 788144129 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2220201121221 its reverse (1221211020222), we get a palindrome (3441412141443).

The spelling of 2220201121221 in words is "two trillion, two hundred twenty billion, two hundred one million, one hundred twenty-one thousand, two hundred twenty-one".