2201122120021 has 12 divisors (see below), whose sum is σ = 2420973327276. Its totient is φ = 1999731451520.

The previous prime is 2201122120013. The next prime is 2201122120031. The reversal of 2201122120021 is 1200212211022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 271273263921 + 1929848856100 = 520839^2 + 1389190^2 .

It is not a de Polignac number, because 2201122120021 - 2³ = 2201122120013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201122119977 and 2201122120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201122120031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5668846 + ... + 6044671.

It is an arithmetic number, because the mean of its divisors is an integer number (201747777273).

Almost surely, 2^{2201122120021} is an apocalyptic number.

It is an amenable number.

2201122120021 is a deficient number, since it is larger than the sum of its proper divisors (219851207255).

2201122120021 is a wasteful number, since it uses less digits than its factorization.

2201122120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11715092 (or 11715081 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2201122120021 its reverse (1200212211022), we get a palindrome (3401334331043).

The spelling of 2201122120021 in words is "two trillion, two hundred one billion, one hundred twenty-two million, one hundred twenty thousand, twenty-one".