20010121222201 has 16 divisors (see below), whose sum is σ = 22047979809600. Its totient is φ = 18008764984000.

The previous prime is 20010121222183. The next prime is 20010121222237. The reversal of 20010121222201 is 10222212101002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20010121222201 - 2¹³ = 20010121214009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010121225201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8296230 + ... + 10433008.

It is an arithmetic number, because the mean of its divisors is an integer number (1377998738100).

Almost surely, 2^{20010121222201} is an apocalyptic number.

It is an amenable number.

20010121222201 is a deficient number, since it is larger than the sum of its proper divisors (2037858587399).

20010121222201 is a wasteful number, since it uses less digits than its factorization.

20010121222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145320.

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

Adding to 20010121222201 its reverse (10222212101002), we get a palindrome (30232333323203).

The spelling of 20010121222201 in words is "twenty trillion, ten billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred one".