2201202121122 has 128 divisors (see below), whose sum is σ = 5134316544000. Its totient is φ = 698079513600.

The previous prime is 2201202121117. The next prime is 2201202121229. The reversal of 2201202121122 is 2211212021022.

It is a happy number.

2201202121122 is a `hidden beast` number, since 220 + 1 + 202 + 121 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2201202121095 and 2201202121104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 131571654 + ... + 131588382.

It is an arithmetic number, because the mean of its divisors is an integer number (40111848000).

Almost surely, 2^{2201202121122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2201202121122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2567158272000).

2201202121122 is an abundant number, since it is smaller than the sum of its proper divisors (2933114422878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2201202121122 is a wasteful number, since it uses less digits than its factorization.

2201202121122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17993 (or 17987 counting only the distinct ones).

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

Adding to 2201202121122 its reverse (2211212021022), we get a palindrome (4412414142144).

The spelling of 2201202121122 in words is "two trillion, two hundred one billion, two hundred two million, one hundred twenty-one thousand, one hundred twenty-two".