2201020122121 has 4 divisors (see below), whose sum is σ = 2231171082772. Its totient is φ = 2170869161472.

The previous prime is 2201020122101. The next prime is 2201020122149. The reversal of 2201020122121 is 1212210201022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 434808360000 + 1766211762121 = 659400^2 + 1328989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201020122121 - 2⁵ = 2201020122089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201020122095 and 2201020122104.

It is not an unprimeable number, because it can be changed into a prime (2201020122101) 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, 15075480216 + ... + 15075480361.

It is an arithmetic number, because the mean of its divisors is an integer number (557792770693).

Almost surely, 2^{2201020122121} is an apocalyptic number.

It is an amenable number.

2201020122121 is a deficient number, since it is larger than the sum of its proper divisors (30150960651).

2201020122121 is an equidigital number, since it uses as much as digits as its factorization.

2201020122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30150960650.

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

Adding to 2201020122121 its reverse (1212210201022), we get a palindrome (3413230323143).

The spelling of 2201020122121 in words is "two trillion, two hundred one billion, twenty million, one hundred twenty-two thousand, one hundred twenty-one".